text: /*
  Copyright (c) 2010, Yahoo! Inc. All rights reserved.
  Code licensed under the BSD License:
  http://developer.yahoo.com/yui/license.html
  version: 2.8.1
  */
  (function () {
  
  var lang   = YAHOO.lang,
      util   = YAHOO.util,
      Ev     = util.Event;
  
  /**
   * The DataSource utility provides a common configurable interface for widgets to
   * access a variety of data, from JavaScript arrays to online database servers.
   *
   * @module datasource
   * @requires yahoo, event
   * @optional json, get, connection 
   * @title DataSource Utility
   */
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  /**
   * Base class for the YUI DataSource utility.
   *
   * @namespace YAHOO.util
   * @class YAHOO.util.DataSourceBase
   * @constructor
   * @param oLiveData {HTMLElement}  Pointer to live data.
   * @param oConfigs {object} (optional) Object literal of configuration values.
   */
  util.DataSourceBase = function(oLiveData, oConfigs) {
      if(oLiveData === null || oLiveData === undefined) {
          return;
      }
      
      this.liveData = oLiveData;
      this._oQueue = {interval:null, conn:null, requests:[]};
      this.responseSchema = {};   
  
      // Set any config params passed in to override defaults
      if(oConfigs && (oConfigs.constructor == Object)) {
          for(var sConfig in oConfigs) {
              if(sConfig) {
                  this[sConfig] = oConfigs[sConfig];
              }
          }
      }
      
      // Validate and initialize public configs
      var maxCacheEntries = this.maxCacheEntries;
      if(!lang.isNumber(maxCacheEntries) || (maxCacheEntries < 0)) {
          maxCacheEntries = 0;
      }
  
      // Initialize interval tracker
      this._aIntervals = [];
  
      /////////////////////////////////////////////////////////////////////////////
      //
      // Custom Events
      //
      /////////////////////////////////////////////////////////////////////////////
  
      /**
       * Fired when a request is made to the local cache.
       *
       * @event cacheRequestEvent
       * @param oArgs.request {Object} The request object.
       * @param oArgs.callback {Object} The callback object.
       * @param oArgs.caller {Object} (deprecated) Use callback.scope.
       */
      this.createEvent("cacheRequestEvent");
  
      /**
       * Fired when data is retrieved from the local cache.
       *
       * @event cacheResponseEvent
       * @param oArgs.request {Object} The request object.
       * @param oArgs.response {Object} The response object.
       * @param oArgs.callback {Object} The callback object.
       * @param oArgs.caller {Object} (deprecated) Use callback.scope.
       */
      this.createEvent("cacheResponseEvent");
  
      /**
       * Fired when a request is sent to the live data source.
       *
       * @event requestEvent
       * @param oArgs.request {Object} The request object.
       * @param oArgs.callback {Object} The callback object.
       * @param oArgs.tId {Number} Transaction ID.     
       * @param oArgs.caller {Object} (deprecated) Use callback.scope.
       */
      this.createEvent("requestEvent");
  
      /**
       * Fired when live data source sends response.
       *
       * @event responseEvent
       * @param oArgs.request {Object} The request object.
       * @param oArgs.response {Object} The raw response object.
       * @param oArgs.callback {Object} The callback object.
       * @param oArgs.tId {Number} Transaction ID.     
       * @param oArgs.caller {Object} (deprecated) Use callback.scope.
       */
      this.createEvent("responseEvent");
  
      /**
       * Fired when response is parsed.
       *
       * @event responseParseEvent
       * @param oArgs.request {Object} The request object.
       * @param oArgs.response {Object} The parsed response object.
       * @param oArgs.callback {Object} The callback object.
       * @param oArgs.caller {Object} (deprecated) Use callback.scope.
       */
      this.createEvent("responseParseEvent");
  
      /**
       * Fired when response is cached.
       *
       * @event responseCacheEvent
       * @param oArgs.request {Object} The request object.
       * @param oArgs.response {Object} The parsed response object.
       * @param oArgs.callback {Object} The callback object.
       * @param oArgs.caller {Object} (deprecated) Use callback.scope.
       */
      this.createEvent("responseCacheEvent");
      /**
       * Fired when an error is encountered with the live data source.
       *
       * @event dataErrorEvent
       * @param oArgs.request {Object} The request object.
       * @param oArgs.response {String} The response object (if available).
       * @param oArgs.callback {Object} The callback object.
       * @param oArgs.caller {Object} (deprecated) Use callback.scope.
       * @param oArgs.message {String} The error message.
       */
      this.createEvent("dataErrorEvent");
  
      /**
       * Fired when the local cache is flushed.
       *
       * @event cacheFlushEvent
       */
      this.createEvent("cacheFlushEvent");
  
      var DS = util.DataSourceBase;
      this._sName = "DataSource instance" + DS._nIndex;
      DS._nIndex++;
  };
  
  var DS = util.DataSourceBase;
  
  lang.augmentObject(DS, {
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // DataSourceBase public constants
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Type is unknown.
   *
   * @property TYPE_UNKNOWN
   * @type Number
   * @final
   * @default -1
   */
  TYPE_UNKNOWN : -1,
  
  /**
   * Type is a JavaScript Array.
   *
   * @property TYPE_JSARRAY
   * @type Number
   * @final
   * @default 0
   */
  TYPE_JSARRAY : 0,
  
  /**
   * Type is a JavaScript Function.
   *
   * @property TYPE_JSFUNCTION
   * @type Number
   * @final
   * @default 1
   */
  TYPE_JSFUNCTION : 1,
  
  /**
   * Type is hosted on a server via an XHR connection.
   *
   * @property TYPE_XHR
   * @type Number
   * @final
   * @default 2
   */
  TYPE_XHR : 2,
  
  /**
   * Type is JSON.
   *
   * @property TYPE_JSON
   * @type Number
   * @final
   * @default 3
   */
  TYPE_JSON : 3,
  
  /**
   * Type is XML.
   *
   * @property TYPE_XML
   * @type Number
   * @final
   * @default 4
   */
  TYPE_XML : 4,
  
  /**
   * Type is plain text.
   *
   * @property TYPE_TEXT
   * @type Number
   * @final
   * @default 5
   */
  TYPE_TEXT : 5,
  
  /**
   * Type is an HTML TABLE element. Data is parsed out of TR elements from all TBODY elements.
   *
   * @property TYPE_HTMLTABLE
   * @type Number
   * @final
   * @default 6
   */
  TYPE_HTMLTABLE : 6,
  
  /**
   * Type is hosted on a server via a dynamic script node.
   *
   * @property TYPE_SCRIPTNODE
   * @type Number
   * @final
   * @default 7
   */
  TYPE_SCRIPTNODE : 7,
  
  /**
   * Type is local.
   *
   * @property TYPE_LOCAL
   * @type Number
   * @final
   * @default 8
   */
  TYPE_LOCAL : 8,
  
  /**
   * Error message for invalid dataresponses.
   *
   * @property ERROR_DATAINVALID
   * @type String
   * @final
   * @default "Invalid data"
   */
  ERROR_DATAINVALID : "Invalid data",
  
  /**
   * Error message for null data responses.
   *
   * @property ERROR_DATANULL
   * @type String
   * @final
   * @default "Null data"
   */
  ERROR_DATANULL : "Null data",
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // DataSourceBase private static properties
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Internal class variable to index multiple DataSource instances.
   *
   * @property DataSourceBase._nIndex
   * @type Number
   * @private
   * @static
   */
  _nIndex : 0,
  
  /**
   * Internal class variable to assign unique transaction IDs.
   *
   * @property DataSourceBase._nTransactionId
   * @type Number
   * @private
   * @static
   */
  _nTransactionId : 0,
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // DataSourceBase private static methods
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Get an XPath-specified value for a given field from an XML node or document.
   *
   * @method _getLocationValue
   * @param field {String | Object} Field definition.
   * @param context {Object} XML node or document to search within.
   * @return {Object} Data value or null.
   * @static
   * @private
   */
  _getLocationValue: function(field, context) {
      var locator = field.locator || field.key || field,
          xmldoc = context.ownerDocument || context,
          result, res, value = null;
  
      try {
          // Standards mode
          if(!lang.isUndefined(xmldoc.evaluate)) {
              result = xmldoc.evaluate(locator, context, xmldoc.createNSResolver(!context.ownerDocument ? context.documentElement : context.ownerDocument.documentElement), 0, null);
              while(res = result.iterateNext()) {
                  value = res.textContent;
              }
          }
          // IE mode
          else {
              xmldoc.setProperty("SelectionLanguage", "XPath");
              result = context.selectNodes(locator)[0];
              value = result.value || result.text || null;
          }
          return value;
  
      }
      catch(e) {
      }
  },
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // DataSourceBase public static methods
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Executes a configured callback.  For object literal callbacks, the third
   * param determines whether to execute the success handler or failure handler.
   *  
   * @method issueCallback
   * @param callback {Function|Object} the callback to execute
   * @param params {Array} params to be passed to the callback method
   * @param error {Boolean} whether an error occurred
   * @param scope {Object} the scope from which to execute the callback
   * (deprecated - use an object literal callback)
   * @static     
   */
  issueCallback : function (callback,params,error,scope) {
      if (lang.isFunction(callback)) {
          callback.apply(scope, params);
      } else if (lang.isObject(callback)) {
          scope = callback.scope || scope || window;
          var callbackFunc = callback.success;
          if (error) {
              callbackFunc = callback.failure;
          }
          if (callbackFunc) {
              callbackFunc.apply(scope, params.concat([callback.argument]));
          }
      }
  },
  
  /**
   * Converts data to type String.
   *
   * @method DataSourceBase.parseString
   * @param oData {String | Number | Boolean | Date | Array | Object} Data to parse.
   * The special values null and undefined will return null.
   * @return {String} A string, or null.
   * @static
   */
  parseString : function(oData) {
      // Special case null and undefined
      if(!lang.isValue(oData)) {
          return null;
      }
      
      //Convert to string
      var string = oData + "";
  
      // Validate
      if(lang.isString(string)) {
          return string;
      }
      else {
          return null;
      }
  },
  
  /**
   * Converts data to type Number.
   *
   * @method DataSourceBase.parseNumber
   * @param oData {String | Number | Boolean} Data to convert. Note, the following
   * values return as null: null, undefined, NaN, "". 
   * @return {Number} A number, or null.
   * @static
   */
  parseNumber : function(oData) {
      if(!lang.isValue(oData) || (oData === "")) {
          return null;
      }
  
      //Convert to number
      var number = oData * 1;
      
      // Validate
      if(lang.isNumber(number)) {
          return number;
      }
      else {
          return null;
      }
  },
  // Backward compatibility
  convertNumber : function(oData) {
      return DS.parseNumber(oData);
  },
  
  /**
   * Converts data to type Date.
   *
   * @method DataSourceBase.parseDate
   * @param oData {Date | String | Number} Data to convert.
   * @return {Date} A Date instance.
   * @static
   */
  parseDate : function(oData) {
      var date = null;
      
      //Convert to date
      if(!(oData instanceof Date)) {
          date = new Date(oData);
      }
      else {
          return oData;
      }
      
      // Validate
      if(date instanceof Date) {
          return date;
      }
      else {
          return null;
      }
  },
  // Backward compatibility
  convertDate : function(oData) {
      return DS.parseDate(oData);
  }
  
  });
  
  // Done in separate step so referenced functions are defined.
  /**
   * Data parsing functions.
   * @property DataSource.Parser
   * @type Object
   * @static
   */
  DS.Parser = {
      string   : DS.parseString,
      number   : DS.parseNumber,
      date     : DS.parseDate
  };
  
  // Prototype properties and methods
  DS.prototype = {
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // DataSourceBase private properties
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Name of DataSource instance.
   *
   * @property _sName
   * @type String
   * @private
   */
  _sName : null,
  
  /**
   * Local cache of data result object literals indexed chronologically.
   *
   * @property _aCache
   * @type Object[]
   * @private
   */
  _aCache : null,
  
  /**
   * Local queue of request connections, enabled if queue needs to be managed.
   *
   * @property _oQueue
   * @type Object
   * @private
   */
  _oQueue : null,
  
  /**
   * Array of polling interval IDs that have been enabled, needed to clear all intervals.
   *
   * @property _aIntervals
   * @type Array
   * @private
   */
  _aIntervals : null,
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // DataSourceBase public properties
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Max size of the local cache.  Set to 0 to turn off caching.  Caching is
   * useful to reduce the number of server connections.  Recommended only for data
   * sources that return comprehensive results for queries or when stale data is
   * not an issue.
   *
   * @property maxCacheEntries
   * @type Number
   * @default 0
   */
  maxCacheEntries : 0,
  
   /**
   * Pointer to live database.
   *
   * @property liveData
   * @type Object
   */
  liveData : null,
  
  /**
   * Where the live data is held:
   * 
   * <dl>  
   *    <dt>TYPE_UNKNOWN</dt>
   *    <dt>TYPE_LOCAL</dt>
   *    <dt>TYPE_XHR</dt>
   *    <dt>TYPE_SCRIPTNODE</dt>
   *    <dt>TYPE_JSFUNCTION</dt>
   * </dl> 
   *  
   * @property dataType
   * @type Number
   * @default YAHOO.util.DataSourceBase.TYPE_UNKNOWN
   *
   */
  dataType : DS.TYPE_UNKNOWN,
  
  /**
   * Format of response:
   *  
   * <dl>  
   *    <dt>TYPE_UNKNOWN</dt>
   *    <dt>TYPE_JSARRAY</dt>
   *    <dt>TYPE_JSON</dt>
   *    <dt>TYPE_XML</dt>
   *    <dt>TYPE_TEXT</dt>
   *    <dt>TYPE_HTMLTABLE</dt> 
   * </dl> 
   *
   * @property responseType
   * @type Number
   * @default YAHOO.util.DataSourceBase.TYPE_UNKNOWN
   */
  responseType : DS.TYPE_UNKNOWN,
  
  /**
   * Response schema object literal takes a combination of the following properties:
   *
   * <dl>
   * <dt>resultsList</dt> <dd>Pointer to array of tabular data</dd>
   * <dt>resultNode</dt> <dd>Pointer to node name of row data (XML data only)</dd>
   * <dt>recordDelim</dt> <dd>Record delimiter (text data only)</dd>
   * <dt>fieldDelim</dt> <dd>Field delimiter (text data only)</dd>
   * <dt>fields</dt> <dd>Array of field names (aka keys), or array of object literals
   * such as: {key:"fieldname",parser:YAHOO.util.DataSourceBase.parseDate}</dd>
   * <dt>metaFields</dt> <dd>Object literal of keys to include in the oParsedResponse.meta collection</dd>
   * <dt>metaNode</dt> <dd>Name of the node under which to search for meta information in XML response data</dd>
   * </dl>
   *
   * @property responseSchema
   * @type Object
   */
  responseSchema : null,
  
  /**
   * Additional arguments passed to the JSON parse routine.  The JSON string
   * is the assumed first argument (where applicable).  This property is not
   * set by default, but the parse methods will use it if present.
   *
   * @property parseJSONArgs
   * @type {MIXED|Array} If an Array, contents are used as individual arguments.
   *                     Otherwise, value is used as an additional argument.
   */
  // property intentionally undefined
   
  /**
   * When working with XML data, setting this property to true enables support for
   * XPath-syntaxed locators in schema definitions.
   *
   * @property useXPath
   * @type Boolean
   * @default false
   */
  useXPath : false,
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // DataSourceBase public methods
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Public accessor to the unique name of the DataSource instance.
   *
   * @method toString
   * @return {String} Unique name of the DataSource instance.
   */
  toString : function() {
      return this._sName;
  },
  
  /**
   * Overridable method passes request to cache and returns cached response if any,
   * refreshing the hit in the cache as the newest item. Returns null if there is
   * no cache hit.
   *
   * @method getCachedResponse
   * @param oRequest {Object} Request object.
   * @param oCallback {Object} Callback object.
   * @param oCaller {Object} (deprecated) Use callback object.
   * @return {Object} Cached response object or null.
   */
  getCachedResponse : function(oRequest, oCallback, oCaller) {
      var aCache = this._aCache;
  
      // If cache is enabled...
      if(this.maxCacheEntries > 0) {        
          // Initialize local cache
          if(!aCache) {
              this._aCache = [];
          }
          // Look in local cache
          else {
              var nCacheLength = aCache.length;
              if(nCacheLength > 0) {
                  var oResponse = null;
                  this.fireEvent("cacheRequestEvent", {request:oRequest,callback:oCallback,caller:oCaller});
          
                  // Loop through each cached element
                  for(var i = nCacheLength-1; i >= 0; i--) {
                      var oCacheElem = aCache[i];
          
                      // Defer cache hit logic to a public overridable method
                      if(this.isCacheHit(oRequest,oCacheElem.request)) {
                          // The cache returned a hit!
                          // Grab the cached response
                          oResponse = oCacheElem.response;
                          this.fireEvent("cacheResponseEvent", {request:oRequest,response:oResponse,callback:oCallback,caller:oCaller});
                          
                          // Refresh the position of the cache hit
                          if(i < nCacheLength-1) {
                              // Remove element from its original location
                              aCache.splice(i,1);
                              // Add as newest
                              this.addToCache(oRequest, oResponse);
                          }
                          
                          // Add a cache flag
                          oResponse.cached = true;
                          break;
                      }
                  }
                  return oResponse;
              }
          }
      }
      else if(aCache) {
          this._aCache = null;
      }
      return null;
  },
  
  /**
   * Default overridable method matches given request to given cached request.
   * Returns true if is a hit, returns false otherwise.  Implementers should
   * override this method to customize the cache-matching algorithm.
   *
   * @method isCacheHit
   * @param oRequest {Object} Request object.
   * @param oCachedRequest {Object} Cached request object.
   * @return {Boolean} True if given request matches cached request, false otherwise.
   */
  isCacheHit : function(oRequest, oCachedRequest) {
      return (oRequest === oCachedRequest);
  },
  
  /**
   * Adds a new item to the cache. If cache is full, evicts the stalest item
   * before adding the new item.
   *
   * @method addToCache
   * @param oRequest {Object} Request object.
   * @param oResponse {Object} Response object to cache.
   */
  addToCache : function(oRequest, oResponse) {
      var aCache = this._aCache;
      if(!aCache) {
          return;
      }
  
      // If the cache is full, make room by removing stalest element (index=0)
      while(aCache.length >= this.maxCacheEntries) {
          aCache.shift();
      }
  
      // Add to cache in the newest position, at the end of the array
      var oCacheElem = {request:oRequest,response:oResponse};
      aCache[aCache.length] = oCacheElem;
      this.fireEvent("responseCacheEvent", {request:oRequest,response:oResponse});
  },
  
  /**
   * Flushes cache.
   *
   * @method flushCache
   */
  flushCache : function() {
      if(this._aCache) {
          this._aCache = [];
          this.fireEvent("cacheFlushEvent");
      }
  },
  
  /**
   * Sets up a polling mechanism to send requests at set intervals and forward
   * responses to given callback.
   *
   * @method setInterval
   * @param nMsec {Number} Length of interval in milliseconds.
   * @param oRequest {Object} Request object.
   * @param oCallback {Function} Handler function to receive the response.
   * @param oCaller {Object} (deprecated) Use oCallback.scope.
   * @return {Number} Interval ID.
   */
  setInterval : function(nMsec, oRequest, oCallback, oCaller) {
      if(lang.isNumber(nMsec) && (nMsec >= 0)) {
          var oSelf = this;
          var nId = setInterval(function() {
              oSelf.makeConnection(oRequest, oCallback, oCaller);
          }, nMsec);
          this._aIntervals.push(nId);
          return nId;
      }
      else {
      }
  },
  
  /**
   * Disables polling mechanism associated with the given interval ID.
   *
   * @method clearInterval
   * @param nId {Number} Interval ID.
   */
  clearInterval : function(nId) {
      // Remove from tracker if there
      var tracker = this._aIntervals || [];
      for(var i=tracker.length-1; i>-1; i--) {
          if(tracker[i] === nId) {
              tracker.splice(i,1);
              clearInterval(nId);
          }
      }
  },
  
  /**
   * Disables all known polling intervals.
   *
   * @method clearAllIntervals
   */
  clearAllIntervals : function() {
      var tracker = this._aIntervals || [];
      for(var i=tracker.length-1; i>-1; i--) {
          clearInterval(tracker[i]);
      }
      tracker = [];
  },
  
  /**
   * First looks for cached response, then sends request to live data. The
   * following arguments are passed to the callback function:
   *     <dl>
   *     <dt><code>oRequest</code></dt>
   *     <dd>The same value that was passed in as the first argument to sendRequest.</dd>
   *     <dt><code>oParsedResponse</code></dt>
   *     <dd>An object literal containing the following properties:
   *         <dl>
   *         <dt><code>tId</code></dt>
   *         <dd>Unique transaction ID number.</dd>
   *         <dt><code>results</code></dt>
   *         <dd>Schema-parsed data results.</dd>
   *         <dt><code>error</code></dt>
   *         <dd>True in cases of data error.</dd>
   *         <dt><code>cached</code></dt>
   *         <dd>True when response is returned from DataSource cache.</dd> 
   *         <dt><code>meta</code></dt>
   *         <dd>Schema-parsed meta data.</dd>
   *         </dl>
   *     <dt><code>oPayload</code></dt>
   *     <dd>The same value as was passed in as <code>argument</code> in the oCallback object literal.</dd>
   *     </dl> 
   *
   * @method sendRequest
   * @param oRequest {Object} Request object.
   * @param oCallback {Object} An object literal with the following properties:
   *     <dl>
   *     <dt><code>success</code></dt>
   *     <dd>The function to call when the data is ready.</dd>
   *     <dt><code>failure</code></dt>
   *     <dd>The function to call upon a response failure condition.</dd>
   *     <dt><code>scope</code></dt>
   *     <dd>The object to serve as the scope for the success and failure handlers.</dd>
   *     <dt><code>argument</code></dt>
   *     <dd>Arbitrary data that will be passed back to the success and failure handlers.</dd>
   *     </dl> 
   * @param oCaller {Object} (deprecated) Use oCallback.scope.
   * @return {Number} Transaction ID, or null if response found in cache.
   */
  sendRequest : function(oRequest, oCallback, oCaller) {
      // First look in cache
      var oCachedResponse = this.getCachedResponse(oRequest, oCallback, oCaller);
      if(oCachedResponse) {
          DS.issueCallback(oCallback,[oRequest,oCachedResponse],false,oCaller);
          return null;
      }
  
  
      // Not in cache, so forward request to live data
      return this.makeConnection(oRequest, oCallback, oCaller);
  },
  
  /**
   * Overridable default method generates a unique transaction ID and passes 
   * the live data reference directly to the  handleResponse function. This
   * method should be implemented by subclasses to achieve more complex behavior
   * or to access remote data.          
   *
   * @method makeConnection
   * @param oRequest {Object} Request object.
   * @param oCallback {Object} Callback object literal.
   * @param oCaller {Object} (deprecated) Use oCallback.scope.
   * @return {Number} Transaction ID.
   */
  makeConnection : function(oRequest, oCallback, oCaller) {
      var tId = DS._nTransactionId++;
      this.fireEvent("requestEvent", {tId:tId, request:oRequest,callback:oCallback,caller:oCaller});
  
      /* accounts for the following cases:
      YAHOO.util.DataSourceBase.TYPE_UNKNOWN
      YAHOO.util.DataSourceBase.TYPE_JSARRAY
      YAHOO.util.DataSourceBase.TYPE_JSON
      YAHOO.util.DataSourceBase.TYPE_HTMLTABLE
      YAHOO.util.DataSourceBase.TYPE_XML
      YAHOO.util.DataSourceBase.TYPE_TEXT
      */
      var oRawResponse = this.liveData;
      
      this.handleResponse(oRequest, oRawResponse, oCallback, oCaller, tId);
      return tId;
  },
  
  /**
   * Receives raw data response and type converts to XML, JSON, etc as necessary.
   * Forwards oFullResponse to appropriate parsing function to get turned into
   * oParsedResponse. Calls doBeforeCallback() and adds oParsedResponse to 
   * the cache when appropriate before calling issueCallback().
   * 
   * The oParsedResponse object literal has the following properties:
   * <dl>
   *     <dd><dt>tId {Number}</dt> Unique transaction ID</dd>
   *     <dd><dt>results {Array}</dt> Array of parsed data results</dd>
   *     <dd><dt>meta {Object}</dt> Object literal of meta values</dd> 
   *     <dd><dt>error {Boolean}</dt> (optional) True if there was an error</dd>
   *     <dd><dt>cached {Boolean}</dt> (optional) True if response was cached</dd>
   * </dl>
   *
   * @method handleResponse
   * @param oRequest {Object} Request object
   * @param oRawResponse {Object} The raw response from the live database.
   * @param oCallback {Object} Callback object literal.
   * @param oCaller {Object} (deprecated) Use oCallback.scope.
   * @param tId {Number} Transaction ID.
   */
  handleResponse : function(oRequest, oRawResponse, oCallback, oCaller, tId) {
      this.fireEvent("responseEvent", {tId:tId, request:oRequest, response:oRawResponse,
              callback:oCallback, caller:oCaller});
      var xhr = (this.dataType == DS.TYPE_XHR) ? true : false;
      var oParsedResponse = null;
      var oFullResponse = oRawResponse;
      
      // Try to sniff data type if it has not been defined
      if(this.responseType === DS.TYPE_UNKNOWN) {
          var ctype = (oRawResponse && oRawResponse.getResponseHeader) ? oRawResponse.getResponseHeader["Content-Type"] : null;
          if(ctype) {
               // xml
              if(ctype.indexOf("text/xml") > -1) {
                  this.responseType = DS.TYPE_XML;
              }
              else if(ctype.indexOf("application/json") > -1) { // json
                  this.responseType = DS.TYPE_JSON;
              }
              else if(ctype.indexOf("text/plain") > -1) { // text
                  this.responseType = DS.TYPE_TEXT;
              }
          }
          else {
              if(YAHOO.lang.isArray(oRawResponse)) { // array
                  this.responseType = DS.TYPE_JSARRAY;
              }
               // xml
              else if(oRawResponse && oRawResponse.nodeType && (oRawResponse.nodeType === 9 || oRawResponse.nodeType === 1 || oRawResponse.nodeType === 11)) {
                  this.responseType = DS.TYPE_XML;
              }
              else if(oRawResponse && oRawResponse.nodeName && (oRawResponse.nodeName.toLowerCase() == "table")) { // table
                  this.responseType = DS.TYPE_HTMLTABLE;
              }    
              else if(YAHOO.lang.isObject(oRawResponse)) { // json
                  this.responseType = DS.TYPE_JSON;
              }
              else if(YAHOO.lang.isString(oRawResponse)) { // text
                  this.responseType = DS.TYPE_TEXT;
              }
          }
      }
  
      switch(this.responseType) {
          case DS.TYPE_JSARRAY:
              if(xhr && oRawResponse && oRawResponse.responseText) {
                  oFullResponse = oRawResponse.responseText; 
              }
              try {
                  // Convert to JS array if it's a string
                  if(lang.isString(oFullResponse)) {
                      var parseArgs = [oFullResponse].concat(this.parseJSONArgs);
                      // Check for YUI JSON Util
                      if(lang.JSON) {
                          oFullResponse = lang.JSON.parse.apply(lang.JSON,parseArgs);
                      }
                      // Look for JSON parsers using an API similar to json2.js
                      else if(window.JSON && JSON.parse) {
                          oFullResponse = JSON.parse.apply(JSON,parseArgs);
                      }
                      // Look for JSON parsers using an API similar to json.js
                      else if(oFullResponse.parseJSON) {
                          oFullResponse = oFullResponse.parseJSON.apply(oFullResponse,parseArgs.slice(1));
                      }
                      // No JSON lib found so parse the string
                      else {
                          // Trim leading spaces
                          while (oFullResponse.length > 0 &&
                                  (oFullResponse.charAt(0) != "{") &&
                                  (oFullResponse.charAt(0) != "[")) {
                              oFullResponse = oFullResponse.substring(1, oFullResponse.length);
                          }
  
                          if(oFullResponse.length > 0) {
                              // Strip extraneous stuff at the end
                              var arrayEnd =
  Math.max(oFullResponse.lastIndexOf("]"),oFullResponse.lastIndexOf("}"));
                              oFullResponse = oFullResponse.substring(0,arrayEnd+1);
  
                              // Turn the string into an object literal...
                              // ...eval is necessary here
                              oFullResponse = eval("(" + oFullResponse + ")");
  
                          }
                      }
                  }
              }
              catch(e1) {
              }
              oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
              oParsedResponse = this.parseArrayData(oRequest, oFullResponse);
              break;
          case DS.TYPE_JSON:
              if(xhr && oRawResponse && oRawResponse.responseText) {
                  oFullResponse = oRawResponse.responseText;
              }
              try {
                  // Convert to JSON object if it's a string
                  if(lang.isString(oFullResponse)) {
                      var parseArgs = [oFullResponse].concat(this.parseJSONArgs);
                      // Check for YUI JSON Util
                      if(lang.JSON) {
                          oFullResponse = lang.JSON.parse.apply(lang.JSON,parseArgs);
                      }
                      // Look for JSON parsers using an API similar to json2.js
                      else if(window.JSON && JSON.parse) {
                          oFullResponse = JSON.parse.apply(JSON,parseArgs);
                      }
                      // Look for JSON parsers using an API similar to json.js
                      else if(oFullResponse.parseJSON) {
                          oFullResponse = oFullResponse.parseJSON.apply(oFullResponse,parseArgs.slice(1));
                      }
                      // No JSON lib found so parse the string
                      else {
                          // Trim leading spaces
                          while (oFullResponse.length > 0 &&
                                  (oFullResponse.charAt(0) != "{") &&
                                  (oFullResponse.charAt(0) != "[")) {
                              oFullResponse = oFullResponse.substring(1, oFullResponse.length);
                          }
      
                          if(oFullResponse.length > 0) {
                              // Strip extraneous stuff at the end
                              var objEnd = Math.max(oFullResponse.lastIndexOf("]"),oFullResponse.lastIndexOf("}"));
                              oFullResponse = oFullResponse.substring(0,objEnd+1);
      
                              // Turn the string into an object literal...
                              // ...eval is necessary here
                              oFullResponse = eval("(" + oFullResponse + ")");
      
                          }
                      }
                  }
              }
              catch(e) {
              }
  
              oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
              oParsedResponse = this.parseJSONData(oRequest, oFullResponse);
              break;
          case DS.TYPE_HTMLTABLE:
              if(xhr && oRawResponse.responseText) {
                  var el = document.createElement('div');
                  el.innerHTML = oRawResponse.responseText;
                  oFullResponse = el.getElementsByTagName('table')[0];
              }
              oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
              oParsedResponse = this.parseHTMLTableData(oRequest, oFullResponse);
              break;
          case DS.TYPE_XML:
              if(xhr && oRawResponse.responseXML) {
                  oFullResponse = oRawResponse.responseXML;
              }
              oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
              oParsedResponse = this.parseXMLData(oRequest, oFullResponse);
              break;
          case DS.TYPE_TEXT:
              if(xhr && lang.isString(oRawResponse.responseText)) {
                  oFullResponse = oRawResponse.responseText;
              }
              oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
              oParsedResponse = this.parseTextData(oRequest, oFullResponse);
              break;
          default:
              oFullResponse = this.doBeforeParseData(oRequest, oFullResponse, oCallback);
              oParsedResponse = this.parseData(oRequest, oFullResponse);
              break;
      }
  
  
      // Clean up for consistent signature
      oParsedResponse = oParsedResponse || {};
      if(!oParsedResponse.results) {
          oParsedResponse.results = [];
      }
      if(!oParsedResponse.meta) {
          oParsedResponse.meta = {};
      }
  
      // Success
      if(!oParsedResponse.error) {
          // Last chance to touch the raw response or the parsed response
          oParsedResponse = this.doBeforeCallback(oRequest, oFullResponse, oParsedResponse, oCallback);
          this.fireEvent("responseParseEvent", {request:oRequest,
                  response:oParsedResponse, callback:oCallback, caller:oCaller});
          // Cache the response
          this.addToCache(oRequest, oParsedResponse);
      }
      // Error
      else {
          // Be sure the error flag is on
          oParsedResponse.error = true;
          this.fireEvent("dataErrorEvent", {request:oRequest, response: oRawResponse, callback:oCallback, 
                  caller:oCaller, message:DS.ERROR_DATANULL});
      }
  
      // Send the response back to the caller
      oParsedResponse.tId = tId;
      DS.issueCallback(oCallback,[oRequest,oParsedResponse],oParsedResponse.error,oCaller);
  },
  
  /**
   * Overridable method gives implementers access to the original full response
   * before the data gets parsed. Implementers should take care not to return an
   * unparsable or otherwise invalid response.
   *
   * @method doBeforeParseData
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full response from the live database.
   * @param oCallback {Object} The callback object.  
   * @return {Object} Full response for parsing.
    
   */
  doBeforeParseData : function(oRequest, oFullResponse, oCallback) {
      return oFullResponse;
  },
  
  /**
   * Overridable method gives implementers access to the original full response and
   * the parsed response (parsed against the given schema) before the data
   * is added to the cache (if applicable) and then sent back to callback function.
   * This is your chance to access the raw response and/or populate the parsed
   * response with any custom data.
   *
   * @method doBeforeCallback
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full response from the live database.
   * @param oParsedResponse {Object} The parsed response to return to calling object.
   * @param oCallback {Object} The callback object. 
   * @return {Object} Parsed response object.
   */
  doBeforeCallback : function(oRequest, oFullResponse, oParsedResponse, oCallback) {
      return oParsedResponse;
  },
  
  /**
   * Overridable method parses data of generic RESPONSE_TYPE into a response object.
   *
   * @method parseData
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full Array from the live database.
   * @return {Object} Parsed response object with the following properties:<br>
   *     - results {Array} Array of parsed data results<br>
   *     - meta {Object} Object literal of meta values<br>
   *     - error {Boolean} (optional) True if there was an error<br>
   */
  parseData : function(oRequest, oFullResponse) {
      if(lang.isValue(oFullResponse)) {
          var oParsedResponse = {results:oFullResponse,meta:{}};
          return oParsedResponse;
  
      }
      return null;
  },
  
  /**
   * Overridable method parses Array data into a response object.
   *
   * @method parseArrayData
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full Array from the live database.
   * @return {Object} Parsed response object with the following properties:<br>
   *     - results (Array) Array of parsed data results<br>
   *     - error (Boolean) True if there was an error
   */
  parseArrayData : function(oRequest, oFullResponse) {
      if(lang.isArray(oFullResponse)) {
          var results = [],
              i, j,
              rec, field, data;
          
          // Parse for fields
          if(lang.isArray(this.responseSchema.fields)) {
              var fields = this.responseSchema.fields;
              for (i = fields.length - 1; i >= 0; --i) {
                  if (typeof fields[i] !== 'object') {
                      fields[i] = { key : fields[i] };
                  }
              }
  
              var parsers = {}, p;
              for (i = fields.length - 1; i >= 0; --i) {
                  p = (typeof fields[i].parser === 'function' ?
                            fields[i].parser :
                            DS.Parser[fields[i].parser+'']) || fields[i].converter;
                  if (p) {
                      parsers[fields[i].key] = p;
                  }
              }
  
              var arrType = lang.isArray(oFullResponse[0]);
              for(i=oFullResponse.length-1; i>-1; i--) {
                  var oResult = {};
                  rec = oFullResponse[i];
                  if (typeof rec === 'object') {
                      for(j=fields.length-1; j>-1; j--) {
                          field = fields[j];
                          data = arrType ? rec[j] : rec[field.key];
  
                          if (parsers[field.key]) {
                              data = parsers[field.key].call(this,data);
                          }
  
                          // Safety measure
                          if(data === undefined) {
                              data = null;
                          }
  
                          oResult[field.key] = data;
                      }
                  }
                  else if (lang.isString(rec)) {
                      for(j=fields.length-1; j>-1; j--) {
                          field = fields[j];
                          data = rec;
  
                          if (parsers[field.key]) {
                              data = parsers[field.key].call(this,data);
                          }
  
                          // Safety measure
                          if(data === undefined) {
                              data = null;
                          }
  
                          oResult[field.key] = data;
                      }                
                  }
                  results[i] = oResult;
              }    
          }
          // Return entire data set
          else {
              results = oFullResponse;
          }
          var oParsedResponse = {results:results};
          return oParsedResponse;
  
      }
      return null;
  },
  
  /**
   * Overridable method parses plain text data into a response object.
   *
   * @method parseTextData
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full text response from the live database.
   * @return {Object} Parsed response object with the following properties:<br>
   *     - results (Array) Array of parsed data results<br>
   *     - error (Boolean) True if there was an error
   */
  parseTextData : function(oRequest, oFullResponse) {
      if(lang.isString(oFullResponse)) {
          if(lang.isString(this.responseSchema.recordDelim) &&
                  lang.isString(this.responseSchema.fieldDelim)) {
              var oParsedResponse = {results:[]};
              var recDelim = this.responseSchema.recordDelim;
              var fieldDelim = this.responseSchema.fieldDelim;
              if(oFullResponse.length > 0) {
                  // Delete the last line delimiter at the end of the data if it exists
                  var newLength = oFullResponse.length-recDelim.length;
                  if(oFullResponse.substr(newLength) == recDelim) {
                      oFullResponse = oFullResponse.substr(0, newLength);
                  }
                  if(oFullResponse.length > 0) {
                      // Split along record delimiter to get an array of strings
                      var recordsarray = oFullResponse.split(recDelim);
                      // Cycle through each record
                      for(var i = 0, len = recordsarray.length, recIdx = 0; i < len; ++i) {
                          var bError = false,
                              sRecord = recordsarray[i];
                          if (lang.isString(sRecord) && (sRecord.length > 0)) {
                              // Split each record along field delimiter to get data
                              var fielddataarray = recordsarray[i].split(fieldDelim);
                              var oResult = {};
                              
                              // Filter for fields data
                              if(lang.isArray(this.responseSchema.fields)) {
                                  var fields = this.responseSchema.fields;
                                  for(var j=fields.length-1; j>-1; j--) {
                                      try {
                                          // Remove quotation marks from edges, if applicable
                                          var data = fielddataarray[j];
                                          if (lang.isString(data)) {
                                              if(data.charAt(0) == "\"") {
                                                  data = data.substr(1);
                                              }
                                              if(data.charAt(data.length-1) == "\"") {
                                                  data = data.substr(0,data.length-1);
                                              }
                                              var field = fields[j];
                                              var key = (lang.isValue(field.key)) ? field.key : field;
                                              // Backward compatibility
                                              if(!field.parser && field.converter) {
                                                  field.parser = field.converter;
                                              }
                                              var parser = (typeof field.parser === 'function') ?
                                                  field.parser :
                                                  DS.Parser[field.parser+''];
                                              if(parser) {
                                                  data = parser.call(this, data);
                                              }
                                              // Safety measure
                                              if(data === undefined) {
                                                  data = null;
                                              }
                                              oResult[key] = data;
                                          }
                                          else {
                                              bError = true;
                                          }
                                      }
                                      catch(e) {
                                          bError = true;
                                      }
                                  }
                              }            
                              // No fields defined so pass along all data as an array
                              else {
                                  oResult = fielddataarray;
                              }
                              if(!bError) {
                                  oParsedResponse.results[recIdx++] = oResult;
                              }
                          }
                      }
                  }
              }
              return oParsedResponse;
          }
      }
      return null;
              
  },
  
  /**
   * Overridable method parses XML data for one result into an object literal.
   *
   * @method parseXMLResult
   * @param result {XML} XML for one result.
   * @return {Object} Object literal of data for one result.
   */
  parseXMLResult : function(result) {
      var oResult = {},
          schema = this.responseSchema;
          
      try {
          // Loop through each data field in each result using the schema
          for(var m = schema.fields.length-1; m >= 0 ; m--) {
              var field = schema.fields[m];
              var key = (lang.isValue(field.key)) ? field.key : field;
              var data = null;
  
              if(this.useXPath) {
                  data = YAHOO.util.DataSource._getLocationValue(field, result);
              }
              else {
                  // Values may be held in an attribute...
                  var xmlAttr = result.attributes.getNamedItem(key);
                  if(xmlAttr) {
                      data = xmlAttr.value;
                  }
                  // ...or in a node
                  else {
                      var xmlNode = result.getElementsByTagName(key);
                      if(xmlNode && xmlNode.item(0)) {
                          var item = xmlNode.item(0);
                          // For IE, then DOM...
                          data = (item) ? ((item.text) ? item.text : (item.textContent) ? item.textContent : null) : null;
                          // ...then fallback, but check for multiple child nodes
                          if(!data) {
                              var datapieces = [];
                              for(var j=0, len=item.childNodes.length; j<len; j++) {
                                  if(item.childNodes[j].nodeValue) {
                                      datapieces[datapieces.length] = item.childNodes[j].nodeValue;
                                  }
                              }
                              if(datapieces.length > 0) {
                                  data = datapieces.join("");
                              }
                          }
                      }
                  }
              }
              
              
              // Safety net
              if(data === null) {
                     data = "";
              }
              // Backward compatibility
              if(!field.parser && field.converter) {
                  field.parser = field.converter;
              }
              var parser = (typeof field.parser === 'function') ?
                  field.parser :
                  DS.Parser[field.parser+''];
              if(parser) {
                  data = parser.call(this, data);
              }
              // Safety measure
              if(data === undefined) {
                  data = null;
              }
              oResult[key] = data;
          }
      }
      catch(e) {
      }
  
      return oResult;
  },
  
  
  
  /**
   * Overridable method parses XML data into a response object.
   *
   * @method parseXMLData
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full XML response from the live database.
   * @return {Object} Parsed response object with the following properties<br>
   *     - results (Array) Array of parsed data results<br>
   *     - error (Boolean) True if there was an error
   */
  parseXMLData : function(oRequest, oFullResponse) {
      var bError = false,
          schema = this.responseSchema,
          oParsedResponse = {meta:{}},
          xmlList = null,
          metaNode      = schema.metaNode,
          metaLocators  = schema.metaFields || {},
          i,k,loc,v;
  
      // In case oFullResponse is something funky
      try {
          // Pull any meta identified
          if(this.useXPath) {
              for (k in metaLocators) {
                  oParsedResponse.meta[k] = YAHOO.util.DataSource._getLocationValue(metaLocators[k], oFullResponse);
              }
          }
          else {
              metaNode = metaNode ? oFullResponse.getElementsByTagName(metaNode)[0] :
                         oFullResponse;
  
              if (metaNode) {
                  for (k in metaLocators) {
                      if (lang.hasOwnProperty(metaLocators, k)) {
                          loc = metaLocators[k];
                          // Look for a node
                          v = metaNode.getElementsByTagName(loc)[0];
  
                          if (v) {
                              v = v.firstChild.nodeValue;
                          } else {
                              // Look for an attribute
                              v = metaNode.attributes.getNamedItem(loc);
                              if (v) {
                                  v = v.value;
                              }
                          }
  
                          if (lang.isValue(v)) {
                              oParsedResponse.meta[k] = v;
                          }
                      }
                  }
              }
          }
          
          // For result data
          xmlList = (schema.resultNode) ?
              oFullResponse.getElementsByTagName(schema.resultNode) :
              null;
      }
      catch(e) {
      }
      if(!xmlList || !lang.isArray(schema.fields)) {
          bError = true;
      }
      // Loop through each result
      else {
          oParsedResponse.results = [];
          for(i = xmlList.length-1; i >= 0 ; --i) {
              var oResult = this.parseXMLResult(xmlList.item(i));
              // Capture each array of values into an array of results
              oParsedResponse.results[i] = oResult;
          }
      }
      if(bError) {
          oParsedResponse.error = true;
      }
      else {
      }
      return oParsedResponse;
  },
  
  /**
   * Overridable method parses JSON data into a response object.
   *
   * @method parseJSONData
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full JSON from the live database.
   * @return {Object} Parsed response object with the following properties<br>
   *     - results (Array) Array of parsed data results<br>
   *     - error (Boolean) True if there was an error
   */
  parseJSONData : function(oRequest, oFullResponse) {
      var oParsedResponse = {results:[],meta:{}};
      
      if(lang.isObject(oFullResponse) && this.responseSchema.resultsList) {
          var schema = this.responseSchema,
              fields          = schema.fields,
              resultsList     = oFullResponse,
              results         = [],
              metaFields      = schema.metaFields || {},
              fieldParsers    = [],
              fieldPaths      = [],
              simpleFields    = [],
              bError          = false,
              i,len,j,v,key,parser,path;
  
          // Function to convert the schema's fields into walk paths
          var buildPath = function (needle) {
              var path = null, keys = [], i = 0;
              if (needle) {
                  // Strip the ["string keys"] and [1] array indexes
                  needle = needle.
                      replace(/\[(['"])(.*?)\1\]/g,
                      function (x,$1,$2) {keys[i]=$2;return '.@'+(i++);}).
                      replace(/\[(\d+)\]/g,
                      function (x,$1) {keys[i]=parseInt($1,10)|0;return '.@'+(i++);}).
                      replace(/^\./,''); // remove leading dot
  
                  // If the cleaned needle contains invalid characters, the
                  // path is invalid
                  if (!/[^\w\.\$@]/.test(needle)) {
                      path = needle.split('.');
                      for (i=path.length-1; i >= 0; --i) {
                          if (path[i].charAt(0) === '@') {
                              path[i] = keys[parseInt(path[i].substr(1),10)];
                          }
                      }
                  }
                  else {
                  }
              }
              return path;
          };
  
  
          // Function to walk a path and return the pot of gold
          var walkPath = function (path, origin) {
              var v=origin,i=0,len=path.length;
              for (;i<len && v;++i) {
                  v = v[path[i]];
              }
              return v;
          };
  
          // Parse the response
          // Step 1. Pull the resultsList from oFullResponse (default assumes
          // oFullResponse IS the resultsList)
          path = buildPath(schema.resultsList);
          if (path) {
              resultsList = walkPath(path, oFullResponse);
              if (resultsList === undefined) {
                  bError = true;
              }
          } else {
              bError = true;
          }
          
          if (!resultsList) {
              resultsList = [];
          }
  
          if (!lang.isArray(resultsList)) {
              resultsList = [resultsList];
          }
  
          if (!bError) {
              // Step 2. Parse out field data if identified
              if(schema.fields) {
                  var field;
                  // Build the field parser map and location paths
                  for (i=0, len=fields.length; i<len; i++) {
                      field = fields[i];
                      key    = field.key || field;
                      parser = ((typeof field.parser === 'function') ?
                          field.parser :
                          DS.Parser[field.parser+'']) || field.converter;
                      path   = buildPath(key);
      
                      if (parser) {
                          fieldParsers[fieldParsers.length] = {key:key,parser:parser};
                      }
      
                      if (path) {
                          if (path.length > 1) {
                              fieldPaths[fieldPaths.length] = {key:key,path:path};
                          } else {
                              simpleFields[simpleFields.length] = {key:key,path:path[0]};
                          }
                      } else {
                      }
                  }
  
                  // Process the results, flattening the records and/or applying parsers if needed
                  for (i = resultsList.length - 1; i >= 0; --i) {
                      var r = resultsList[i], rec = {};
                      if(r) {
                          for (j = simpleFields.length - 1; j >= 0; --j) {
                              // Bug 1777850: data might be held in an array
                              rec[simpleFields[j].key] =
                                      (r[simpleFields[j].path] !== undefined) ?
                                      r[simpleFields[j].path] : r[j];
                          }
  
                          for (j = fieldPaths.length - 1; j >= 0; --j) {
                              rec[fieldPaths[j].key] = walkPath(fieldPaths[j].path,r);
                          }
  
                          for (j = fieldParsers.length - 1; j >= 0; --j) {
                              var p = fieldParsers[j].key;
                              rec[p] = fieldParsers[j].parser(rec[p]);
                              if (rec[p] === undefined) {
                                  rec[p] = null;
                              }
                          }
                      }
                      results[i] = rec;
                  }
              }
              else {
                  results = resultsList;
              }
  
              for (key in metaFields) {
                  if (lang.hasOwnProperty(metaFields,key)) {
                      path = buildPath(metaFields[key]);
                      if (path) {
                          v = walkPath(path, oFullResponse);
                          oParsedResponse.meta[key] = v;
                      }
                  }
              }
  
          } else {
  
              oParsedResponse.error = true;
          }
  
          oParsedResponse.results = results;
      }
      else {
          oParsedResponse.error = true;
      }
  
      return oParsedResponse;
  },
  
  /**
   * Overridable method parses an HTML TABLE element reference into a response object.
   * Data is parsed out of TR elements from all TBODY elements. 
   *
   * @method parseHTMLTableData
   * @param oRequest {Object} Request object.
   * @param oFullResponse {Object} The full HTML element reference from the live database.
   * @return {Object} Parsed response object with the following properties<br>
   *     - results (Array) Array of parsed data results<br>
   *     - error (Boolean) True if there was an error
   */
  parseHTMLTableData : function(oRequest, oFullResponse) {
      var bError = false;
      var elTable = oFullResponse;
      var fields = this.responseSchema.fields;
      var oParsedResponse = {results:[]};
  
      if(lang.isArray(fields)) {
          // Iterate through each TBODY
          for(var i=0; i<elTable.tBodies.length; i++) {
              var elTbody = elTable.tBodies[i];
      
              // Iterate through each TR
              for(var j=elTbody.rows.length-1; j>-1; j--) {
                  var elRow = elTbody.rows[j];
                  var oResult = {};
                  
                  for(var k=fields.length-1; k>-1; k--) {
                      var field = fields[k];
                      var key = (lang.isValue(field.key)) ? field.key : field;
                      var data = elRow.cells[k].innerHTML;
      
                      // Backward compatibility
                      if(!field.parser && field.converter) {
                          field.parser = field.converter;
                      }
                      var parser = (typeof field.parser === 'function') ?
                          field.parser :
                          DS.Parser[field.parser+''];
                      if(parser) {
                          data = parser.call(this, data);
                      }
                      // Safety measure
                      if(data === undefined) {
                          data = null;
                      }
                      oResult[key] = data;
                  }
                  oParsedResponse.results[j] = oResult;
              }
          }
      }
      else {
          bError = true;
      }
  
      if(bError) {
          oParsedResponse.error = true;
      }
      else {
      }
      return oParsedResponse;
  }
  
  };
  
  // DataSourceBase uses EventProvider
  lang.augmentProto(DS, util.EventProvider);
  
  
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  /**
   * LocalDataSource class for in-memory data structs including JavaScript arrays,
   * JavaScript object literals (JSON), XML documents, and HTML tables.
   *
   * @namespace YAHOO.util
   * @class YAHOO.util.LocalDataSource
   * @extends YAHOO.util.DataSourceBase 
   * @constructor
   * @param oLiveData {HTMLElement}  Pointer to live data.
   * @param oConfigs {object} (optional) Object literal of configuration values.
   */
  util.LocalDataSource = function(oLiveData, oConfigs) {
      this.dataType = DS.TYPE_LOCAL;
      
      if(oLiveData) {
          if(YAHOO.lang.isArray(oLiveData)) { // array
              this.responseType = DS.TYPE_JSARRAY;
          }
           // xml
          else if(oLiveData.nodeType && oLiveData.nodeType == 9) {
              this.responseType = DS.TYPE_XML;
          }
          else if(oLiveData.nodeName && (oLiveData.nodeName.toLowerCase() == "table")) { // table
              this.responseType = DS.TYPE_HTMLTABLE;
              oLiveData = oLiveData.cloneNode(true);
          }    
          else if(YAHOO.lang.isString(oLiveData)) { // text
              this.responseType = DS.TYPE_TEXT;
          }
          else if(YAHOO.lang.isObject(oLiveData)) { // json
              this.responseType = DS.TYPE_JSON;
          }
      }
      else {
          oLiveData = [];
          this.responseType = DS.TYPE_JSARRAY;
      }
      
      util.LocalDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
  };
  
  // LocalDataSource extends DataSourceBase
  lang.extend(util.LocalDataSource, DS);
  
  // Copy static members to LocalDataSource class
  lang.augmentObject(util.LocalDataSource, DS);
  
  
  
  
  
  
  
  
  
  
  
  
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  /**
   * FunctionDataSource class for JavaScript functions.
   *
   * @namespace YAHOO.util
   * @class YAHOO.util.FunctionDataSource
   * @extends YAHOO.util.DataSourceBase  
   * @constructor
   * @param oLiveData {HTMLElement}  Pointer to live data.
   * @param oConfigs {object} (optional) Object literal of configuration values.
   */
  util.FunctionDataSource = function(oLiveData, oConfigs) {
      this.dataType = DS.TYPE_JSFUNCTION;
      oLiveData = oLiveData || function() {};
      
      util.FunctionDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
  };
  
  // FunctionDataSource extends DataSourceBase
  lang.extend(util.FunctionDataSource, DS, {
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // FunctionDataSource public properties
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Context in which to execute the function. By default, is the DataSource
   * instance itself. If set, the function will receive the DataSource instance
   * as an additional argument. 
   *
   * @property scope
   * @type Object
   * @default null
   */
  scope : null,
  
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // FunctionDataSource public methods
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Overriding method passes query to a function. The returned response is then
   * forwarded to the handleResponse function.
   *
   * @method makeConnection
   * @param oRequest {Object} Request object.
   * @param oCallback {Object} Callback object literal.
   * @param oCaller {Object} (deprecated) Use oCallback.scope.
   * @return {Number} Transaction ID.
   */
  makeConnection : function(oRequest, oCallback, oCaller) {
      var tId = DS._nTransactionId++;
      this.fireEvent("requestEvent", {tId:tId,request:oRequest,callback:oCallback,caller:oCaller});
  
      // Pass the request in as a parameter and
      // forward the return value to the handler
      
      
      var oRawResponse = (this.scope) ? this.liveData.call(this.scope, oRequest, this) : this.liveData(oRequest);
      
      // Try to sniff data type if it has not been defined
      if(this.responseType === DS.TYPE_UNKNOWN) {
          if(YAHOO.lang.isArray(oRawResponse)) { // array
              this.responseType = DS.TYPE_JSARRAY;
          }
           // xml
          else if(oRawResponse && oRawResponse.nodeType && oRawResponse.nodeType == 9) {
              this.responseType = DS.TYPE_XML;
          }
          else if(oRawResponse && oRawResponse.nodeName && (oRawResponse.nodeName.toLowerCase() == "table")) { // table
              this.responseType = DS.TYPE_HTMLTABLE;
          }    
          else if(YAHOO.lang.isObject(oRawResponse)) { // json
              this.responseType = DS.TYPE_JSON;
          }
          else if(YAHOO.lang.isString(oRawResponse)) { // text
              this.responseType = DS.TYPE_TEXT;
          }
      }
  
      this.handleResponse(oRequest, oRawResponse, oCallback, oCaller, tId);
      return tId;
  }
  
  });
  
  // Copy static members to FunctionDataSource class
  lang.augmentObject(util.FunctionDataSource, DS);
  
  
  
  
  
  
  
  
  
  
  
  
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  /**
   * ScriptNodeDataSource class for accessing remote data via the YUI Get Utility. 
   *
   * @namespace YAHOO.util
   * @class YAHOO.util.ScriptNodeDataSource
   * @extends YAHOO.util.DataSourceBase  
   * @constructor
   * @param oLiveData {HTMLElement}  Pointer to live data.
   * @param oConfigs {object} (optional) Object literal of configuration values.
   */
  util.ScriptNodeDataSource = function(oLiveData, oConfigs) {
      this.dataType = DS.TYPE_SCRIPTNODE;
      oLiveData = oLiveData || "";
      
      util.ScriptNodeDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
  };
  
  // ScriptNodeDataSource extends DataSourceBase
  lang.extend(util.ScriptNodeDataSource, DS, {
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // ScriptNodeDataSource public properties
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Alias to YUI Get Utility, to allow implementers to use a custom class.
   *
   * @property getUtility
   * @type Object
   * @default YAHOO.util.Get
   */
  getUtility : util.Get,
  
  /**
   * Defines request/response management in the following manner:
   * <dl>
   *     <!--<dt>queueRequests</dt>
   *     <dd>If a request is already in progress, wait until response is returned before sending the next request.</dd>
   *     <dt>cancelStaleRequests</dt>
   *     <dd>If a request is already in progress, cancel it before sending the next request.</dd>-->
   *     <dt>ignoreStaleResponses</dt>
   *     <dd>Send all requests, but handle only the response for the most recently sent request.</dd>
   *     <dt>allowAll</dt>
   *     <dd>Send all requests and handle all responses.</dd>
   * </dl>
   *
   * @property asyncMode
   * @type String
   * @default "allowAll"
   */
  asyncMode : "allowAll",
  
  /**
   * Callback string parameter name sent to the remote script. By default,
   * requests are sent to
   * &#60;URI&#62;?&#60;scriptCallbackParam&#62;=callbackFunction
   *
   * @property scriptCallbackParam
   * @type String
   * @default "callback"
   */
  scriptCallbackParam : "callback",
  
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // ScriptNodeDataSource public methods
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Creates a request callback that gets appended to the script URI. Implementers
   * can customize this string to match their server's query syntax.
   *
   * @method generateRequestCallback
   * @return {String} String fragment that gets appended to script URI that 
   * specifies the callback function 
   */
  generateRequestCallback : function(id) {
      return "&" + this.scriptCallbackParam + "=YAHOO.util.ScriptNodeDataSource.callbacks["+id+"]" ;
  },
  
  /**
   * Overridable method gives implementers access to modify the URI before the dynamic
   * script node gets inserted. Implementers should take care not to return an
   * invalid URI.
   *
   * @method doBeforeGetScriptNode
   * @param {String} URI to the script 
   * @return {String} URI to the script
   */
  doBeforeGetScriptNode : function(sUri) {
      return sUri;
  },
  
  /**
   * Overriding method passes query to Get Utility. The returned
   * response is then forwarded to the handleResponse function.
   *
   * @method makeConnection
   * @param oRequest {Object} Request object.
   * @param oCallback {Object} Callback object literal.
   * @param oCaller {Object} (deprecated) Use oCallback.scope.
   * @return {Number} Transaction ID.
   */
  makeConnection : function(oRequest, oCallback, oCaller) {
      var tId = DS._nTransactionId++;
      this.fireEvent("requestEvent", {tId:tId,request:oRequest,callback:oCallback,caller:oCaller});
      
      // If there are no global pending requests, it is safe to purge global callback stack and global counter
      if(util.ScriptNodeDataSource._nPending === 0) {
          util.ScriptNodeDataSource.callbacks = [];
          util.ScriptNodeDataSource._nId = 0;
      }
      
      // ID for this request
      var id = util.ScriptNodeDataSource._nId;
      util.ScriptNodeDataSource._nId++;
      
      // Dynamically add handler function with a closure to the callback stack
      var oSelf = this;
      util.ScriptNodeDataSource.callbacks[id] = function(oRawResponse) {
          if((oSelf.asyncMode !== "ignoreStaleResponses")||
                  (id === util.ScriptNodeDataSource.callbacks.length-1)) { // Must ignore stale responses
                  
              // Try to sniff data type if it has not been defined
              if(oSelf.responseType === DS.TYPE_UNKNOWN) {
                  if(YAHOO.lang.isArray(oRawResponse)) { // array
                      oSelf.responseType = DS.TYPE_JSARRAY;
                  }
                   // xml
                  else if(oRawResponse.nodeType && oRawResponse.nodeType == 9) {
                      oSelf.responseType = DS.TYPE_XML;
                  }
                  else if(oRawResponse.nodeName && (oRawResponse.nodeName.toLowerCase() == "table")) { // table
                      oSelf.responseType = DS.TYPE_HTMLTABLE;
                  }    
                  else if(YAHOO.lang.isObject(oRawResponse)) { // json
                      oSelf.responseType = DS.TYPE_JSON;
                  }
                  else if(YAHOO.lang.isString(oRawResponse)) { // text
                      oSelf.responseType = DS.TYPE_TEXT;
                  }
              }
  
              oSelf.handleResponse(oRequest, oRawResponse, oCallback, oCaller, tId);
          }
          else {
          }
      
          delete util.ScriptNodeDataSource.callbacks[id];
      };
      
      // We are now creating a request
      util.ScriptNodeDataSource._nPending++;
      var sUri = this.liveData + oRequest + this.generateRequestCallback(id);
      sUri = this.doBeforeGetScriptNode(sUri);
      this.getUtility.script(sUri,
              {autopurge: true,
              onsuccess: util.ScriptNodeDataSource._bumpPendingDown,
              onfail: util.ScriptNodeDataSource._bumpPendingDown});
  
      return tId;
  }
  
  });
  
  // Copy static members to ScriptNodeDataSource class
  lang.augmentObject(util.ScriptNodeDataSource, DS);
  
  // Copy static members to ScriptNodeDataSource class
  lang.augmentObject(util.ScriptNodeDataSource,  {
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // ScriptNodeDataSource private static properties
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Unique ID to track requests.
   *
   * @property _nId
   * @type Number
   * @private
   * @static
   */
  _nId : 0,
  
  /**
   * Counter for pending requests. When this is 0, it is safe to purge callbacks
   * array.
   *
   * @property _nPending
   * @type Number
   * @private
   * @static
   */
  _nPending : 0,
  
  /**
   * Global array of callback functions, one for each request sent.
   *
   * @property callbacks
   * @type Function[]
   * @static
   */
  callbacks : []
  
  });
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  /**
   * XHRDataSource class for accessing remote data via the YUI Connection Manager
   * Utility
   *
   * @namespace YAHOO.util
   * @class YAHOO.util.XHRDataSource
   * @extends YAHOO.util.DataSourceBase  
   * @constructor
   * @param oLiveData {HTMLElement}  Pointer to live data.
   * @param oConfigs {object} (optional) Object literal of configuration values.
   */
  util.XHRDataSource = function(oLiveData, oConfigs) {
      this.dataType = DS.TYPE_XHR;
      this.connMgr = this.connMgr || util.Connect;
      oLiveData = oLiveData || "";
      
      util.XHRDataSource.superclass.constructor.call(this, oLiveData, oConfigs); 
  };
  
  // XHRDataSource extends DataSourceBase
  lang.extend(util.XHRDataSource, DS, {
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // XHRDataSource public properties
  //
  /////////////////////////////////////////////////////////////////////////////
  
   /**
   * Alias to YUI Connection Manager, to allow implementers to use a custom class.
   *
   * @property connMgr
   * @type Object
   * @default YAHOO.util.Connect
   */
  connMgr: null,
  
   /**
   * Defines request/response management in the following manner:
   * <dl>
   *     <dt>queueRequests</dt>
   *     <dd>If a request is already in progress, wait until response is returned
   *     before sending the next request.</dd>
   *
   *     <dt>cancelStaleRequests</dt>
   *     <dd>If a request is already in progress, cancel it before sending the next
   *     request.</dd>
   *
   *     <dt>ignoreStaleResponses</dt>
   *     <dd>Send all requests, but handle only the response for the most recently
   *     sent request.</dd>
   *
   *     <dt>allowAll</dt>
   *     <dd>Send all requests and handle all responses.</dd>
   *
   * </dl>
   *
   * @property connXhrMode
   * @type String
   * @default "allowAll"
   */
  connXhrMode: "allowAll",
  
   /**
   * True if data is to be sent via POST. By default, data will be sent via GET.
   *
   * @property connMethodPost
   * @type Boolean
   * @default false
   */
  connMethodPost: false,
  
   /**
   * The connection timeout defines how many  milliseconds the XHR connection will
   * wait for a server response. Any non-zero value will enable the Connection Manager's
   * Auto-Abort feature.
   *
   * @property connTimeout
   * @type Number
   * @default 0
   */
  connTimeout: 0,
  
  /////////////////////////////////////////////////////////////////////////////
  //
  // XHRDataSource public methods
  //
  /////////////////////////////////////////////////////////////////////////////
  
  /**
   * Overriding method passes query to Connection Manager. The returned
   * response is then forwarded to the handleResponse function.
   *
   * @method makeConnection
   * @param oRequest {Object} Request object.
   * @param oCallback {Object} Callback object literal.
   * @param oCaller {Object} (deprecated) Use oCallback.scope.
   * @return {Number} Transaction ID.
   */
  makeConnection : function(oRequest, oCallback, oCaller) {
  
      var oRawResponse = null;
      var tId = DS._nTransactionId++;
      this.fireEvent("requestEvent", {tId:tId,request:oRequest,callback:oCallback,caller:oCaller});
  
      // Set up the callback object and
      // pass the request in as a URL query and
      // forward the response to the handler
      var oSelf = this;
      var oConnMgr = this.connMgr;
      var oQueue = this._oQueue;
  
      /**
       * Define Connection Manager success handler
       *
       * @method _xhrSuccess
       * @param oResponse {Object} HTTPXMLRequest object
       * @private
       */
      var _xhrSuccess = function(oResponse) {
          // If response ID does not match last made request ID,
          // silently fail and wait for the next response
          if(oResponse && (this.connXhrMode == "ignoreStaleResponses") &&
                  (oResponse.tId != oQueue.conn.tId)) {
              return null;
          }
          // Error if no response
          else if(!oResponse) {
              this.fireEvent("dataErrorEvent", {request:oRequest, response:null,
                      callback:oCallback, caller:oCaller,
                      message:DS.ERROR_DATANULL});
  
              // Send error response back to the caller with the error flag on
              DS.issueCallback(oCallback,[oRequest, {error:true}], true, oCaller);
  
              return null;
          }
          // Forward to handler
          else {
              // Try to sniff data type if it has not been defined
              if(this.responseType === DS.TYPE_UNKNOWN) {
                  var ctype = (oResponse.getResponseHeader) ? oResponse.getResponseHeader["Content-Type"] : null;
                  if(ctype) {
                      // xml
                      if(ctype.indexOf("text/xml") > -1) {
                          this.responseType = DS.TYPE_XML;
                      }
                      else if(ctype.indexOf("application/json") > -1) { // json
                          this.responseType = DS.TYPE_JSON;
                      }
                      else if(ctype.indexOf("text/plain") > -1) { // text
                          this.responseType = DS.TYPE_TEXT;
                      }
                  }
              }
              this.handleResponse(oRequest, oResponse, oCallback, oCaller, tId);
          }
      };
  
      /**
       * Define Connection Manager failure handler
       *
       * @method _xhrFailure
       * @param oResponse {Object} HTTPXMLRequest object
       * @private
       */
      var _xhrFailure = function(oResponse) {
          this.fireEvent("dataErrorEvent", {request:oRequest, response: oResponse,
                  callback:oCallback, caller:oCaller,
                  message:DS.ERROR_DATAINVALID});
  
          // Backward compatibility
          if(lang.isString(this.liveData) && lang.isString(oRequest) &&
              (this.liveData.lastIndexOf("?") !== this.liveData.length-1) &&
              (oRequest.indexOf("?") !== 0)){
          }
  
          // Send failure response back to the caller with the error flag on
          oResponse = oResponse || {};
          oResponse.error = true;
          DS.issueCallback(oCallback,[oRequest,oResponse],true, oCaller);
  
          return null;
      };
  
      /**
       * Define Connection Manager callback object
       *
       * @property _xhrCallback
       * @param oResponse {Object} HTTPXMLRequest object
       * @private
       */
       var _xhrCallback = {
          success:_xhrSuccess,
          failure:_xhrFailure,
          scope: this
      };
  
      // Apply Connection Manager timeout
      if(lang.isNumber(this.connTimeout)) {
          _xhrCallback.timeout = this.connTimeout;
      }
  
      // Cancel stale requests
      if(this.connXhrMode == "cancelStaleRequests") {
              // Look in queue for stale requests
              if(oQueue.conn) {
                  if(oConnMgr.abort) {
                      oConnMgr.abort(oQueue.conn);
                      oQueue.conn = null;
                  }
                  else {
                  }
              }
      }
  
      // Get ready to send the request URL
      if(oConnMgr && oConnMgr.asyncRequest) {
          var sLiveData = this.liveData;
          var isPost = this.connMethodPost;
          var sMethod = (isPost) ? "POST" : "GET";
          // Validate request
          var sUri = (isPost || !lang.isValue(oRequest)) ? sLiveData : sLiveData+oRequest;
          var sRequest = (isPost) ? oRequest : null;
  
          // Send the request right away
          if(this.connXhrMode != "queueRequests") {
              oQueue.conn = oConnMgr.asyncRequest(sMethod, sUri, _xhrCallback, sRequest);
          }
          // Queue up then send the request
          else {
              // Found a request already in progress
              if(oQueue.conn) {
                  var allRequests = oQueue.requests;
                  // Add request to queue
                  allRequests.push({request:oRequest, callback:_xhrCallback});
  
                  // Interval needs to be started
                  if(!oQueue.interval) {
                      oQueue.interval = setInterval(function() {
                          // Connection is in progress
                          if(oConnMgr.isCallInProgress(oQueue.conn)) {
                              return;
                          }
                          else {
                              // Send next request
                              if(allRequests.length > 0) {
                                  // Validate request
                                  sUri = (isPost || !lang.isValue(allRequests[0].request)) ? sLiveData : sLiveData+allRequests[0].request;
                                  sRequest = (isPost) ? allRequests[0].request : null;
                                  oQueue.conn = oConnMgr.asyncRequest(sMethod, sUri, allRequests[0].callback, sRequest);
  
                                  // Remove request from queue
                                  allRequests.shift();
                              }
                              // No more requests
                              else {
                                  clearInterval(oQueue.interval);
                                  oQueue.interval = null;
                              }
                          }
                      }, 50);
                  }
              }
              // Nothing is in progress
              else {
                  oQueue.conn = oConnMgr.asyncRequest(sMethod, sUri, _xhrCallback, sRequest);
              }
          }
      }
      else {
          // Send null response back to the caller with the error flag on
          DS.issueCallback(oCallback,[oRequest,{error:true}],true,oCaller);
      }
  
      return tId;
  }
  
  });
  
  // Copy static members to XHRDataSource class
  lang.augmentObject(util.XHRDataSource, DS);
  
  
  
  
  
  
  
  
  
  
  
  
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  /**
   * Factory class for creating a BaseDataSource subclass instance. The sublcass is
   * determined by oLiveData's type, unless the dataType config is explicitly passed in.  
   *
   * @namespace YAHOO.util
   * @class YAHOO.util.DataSource
   * @constructor
   * @param oLiveData {HTMLElement}  Pointer to live data.
   * @param oConfigs {object} (optional) Object literal of configuration values.
   */
  util.DataSource = function(oLiveData, oConfigs) {
      oConfigs = oConfigs || {};
      
      // Point to one of the subclasses, first by dataType if given, then by sniffing oLiveData type.
      var dataType = oConfigs.dataType;
      if(dataType) {
          if(dataType == DS.TYPE_LOCAL) {
              lang.augmentObject(util.DataSource, util.LocalDataSource);
              return new util.LocalDataSource(oLiveData, oConfigs);            
          }
          else if(dataType == DS.TYPE_XHR) {
              lang.augmentObject(util.DataSource, util.XHRDataSource);
              return new util.XHRDataSource(oLiveData, oConfigs);            
          }
          else if(dataType == DS.TYPE_SCRIPTNODE) {
              lang.augmentObject(util.DataSource, util.ScriptNodeDataSource);
              return new util.ScriptNodeDataSource(oLiveData, oConfigs);            
          }
          else if(dataType == DS.TYPE_JSFUNCTION) {
              lang.augmentObject(util.DataSource, util.FunctionDataSource);
              return new util.FunctionDataSource(oLiveData, oConfigs);            
          }
      }
      
      if(YAHOO.lang.isString(oLiveData)) { // strings default to xhr
          lang.augmentObject(util.DataSource, util.XHRDataSource);
          return new util.XHRDataSource(oLiveData, oConfigs);
      }
      else if(YAHOO.lang.isFunction(oLiveData)) {
          lang.augmentObject(util.DataSource, util.FunctionDataSource);
          return new util.FunctionDataSource(oLiveData, oConfigs);
      }
      else { // ultimate default is local
          lang.augmentObject(util.DataSource, util.LocalDataSource);
          return new util.LocalDataSource(oLiveData, oConfigs);
      }
  };
  
  // Copy static members to DataSource class
  lang.augmentObject(util.DataSource, DS);
  
  })();
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  /**
   * The static Number class provides helper functions to deal with data of type
   * Number.
   *
   * @namespace YAHOO.util
   * @requires yahoo
   * @class Number
   * @static
   */
   YAHOO.util.Number = {
   
       /**
       * Takes a native JavaScript Number and formats to string for display to user.
       *
       * @method format
       * @param nData {Number} Number.
       * @param oConfig {Object} (Optional) Optional configuration values:
       *  <dl>
       *   <dt>prefix {String}</dd>
       *   <dd>String prepended before each number, like a currency designator "$"</dd>
       *   <dt>decimalPlaces {Number}</dd>
       *   <dd>Number of decimal places to round.</dd>
       *   <dt>decimalSeparator {String}</dd>
       *   <dd>Decimal separator</dd>
       *   <dt>thousandsSeparator {String}</dd>
       *   <dd>Thousands separator</dd>
       *   <dt>suffix {String}</dd>
       *   <dd>String appended after each number, like " items" (note the space)</dd>
       *   <dt>negativeFormat</dt>
       *   <dd>String used as a guide for how to indicate negative numbers.  The first '#' character in the string will be replaced by the number.  Default '-#'.</dd>
       *  </dl>
       * @return {String} Formatted number for display. Note, the following values
       * return as "": null, undefined, NaN, "".
       */
      format : function(n, cfg) {
          if (!isFinite(+n)) {
              return '';
          }
  
          n   = !isFinite(+n) ? 0 : +n;
          cfg = YAHOO.lang.merge(YAHOO.util.Number.format.defaults, (cfg || {}));
  
          var neg    = n < 0,        absN   = Math.abs(n),
              places = cfg.decimalPlaces,
              sep    = cfg.thousandsSeparator,
              s, bits, i;
  
          if (places < 0) {
              // Get rid of the decimal info
              s = absN - (absN % 1) + '';
              i = s.length + places;
  
              // avoid 123 vs decimalPlaces -4 (should return "0")
              if (i > 0) {
                      // leverage toFixed by making 123 => 0.123 for the rounding
                      // operation, then add the appropriate number of zeros back on
                  s = Number('.' + s).toFixed(i).slice(2) +
                      new Array(s.length - i + 1).join('0');
              } else {
                  s = "0";
              }
          } else {        // There is a bug in IE's toFixed implementation:
              // for n in {(-0.94, -0.5], [0.5, 0.94)} n.toFixed() returns 0
              // instead of -1 and 1. Manually handle that case.
              s = absN < 1 && absN >= 0.5 && !places ? '1' : absN.toFixed(places);
          }
  
          if (absN > 1000) {
              bits  = s.split(/\D/);
              i  = bits[0].length % 3 || 3;
  
              bits[0] = bits[0].slice(0,i) +
                        bits[0].slice(i).replace(/(\d{3})/g, sep + '$1');
  
              s = bits.join(cfg.decimalSeparator);
          }
  
          s = cfg.prefix + s + cfg.suffix;
  
          return neg ? cfg.negativeFormat.replace(/#/,s) : s;
      }
  };
  YAHOO.util.Number.format.defaults = {
      decimalSeparator : '.',
      decimalPlaces    : null,
      thousandsSeparator : '',
      prefix : '',
      suffix : '',
      negativeFormat : '-#'
  };
  
  
  /****************************************************************************/
  /****************************************************************************/
  /****************************************************************************/
  
  (function () {
  
  var xPad=function (x, pad, r)
  {
      if(typeof r === 'undefined')
      {
          r=10;
      }
      for( ; parseInt(x, 10)<r && r>1; r/=10) {
          x = pad.toString() + x;
      }
      return x.toString();
  };
  
  
  /**
   * The static Date class provides helper functions to deal with data of type Date.
   *
   * @namespace YAHOO.util
   * @requires yahoo
   * @class Date
   * @static
   */
   var Dt = {
      formats: {
          a: function (d, l) { return l.a[d.getDay()]; },
          A: function (d, l) { return l.A[d.getDay()]; },
          b: function (d, l) { return l.b[d.getMonth()]; },
          B: function (d, l) { return l.B[d.getMonth()]; },
          C: function (d) { return xPad(parseInt(d.getFullYear()/100, 10), 0); },
          d: ['getDate', '0'],
          e: ['getDate', ' '],
          g: function (d) { return xPad(parseInt(Dt.formats.G(d)%100, 10), 0); },
          G: function (d) {
                  var y = d.getFullYear();
                  var V = parseInt(Dt.formats.V(d), 10);
                  var W = parseInt(Dt.formats.W(d), 10);
      
                  if(W > V) {
                      y++;
                  } else if(W===0 && V>=52) {
                      y--;
                  }
      
                  return y;
              },
          H: ['getHours', '0'],
          I: function (d) { var I=d.getHours()%12; return xPad(I===0?12:I, 0); },
          j: function (d) {
                  var gmd_1 = new Date('' + d.getFullYear() + '/1/1 GMT');
                  var gmdate = new Date('' + d.getFullYear() + '/' + (d.getMonth()+1) + '/' + d.getDate() + ' GMT');
                  var ms = gmdate - gmd_1;
                  var doy = parseInt(ms/60000/60/24, 10)+1;
                  return xPad(doy, 0, 100);
              },
          k: ['getHours', ' '],
          l: function (d) { var I=d.getHours()%12; return xPad(I===0?12:I, ' '); },
          m: function (d) { return xPad(d.getMonth()+1, 0); },
          M: ['getMinutes', '0'],
          p: function (d, l) { return l.p[d.getHours() >= 12 ? 1 : 0 ]; },
          P: function (d, l) { return l.P[d.getHours() >= 12 ? 1 : 0 ]; },
          s: function (d, l) { return parseInt(d.getTime()/1000, 10); },
          S: ['getSeconds', '0'],
          u: function (d) { var dow = d.getDay(); return dow===0?7:dow; },
          U: function (d) {
                  var doy = parseInt(Dt.formats.j(d), 10);
                  var rdow = 6-d.getDay();
                  var woy = parseInt((doy+rdow)/7, 10);
                  return xPad(woy, 0);
              },
          V: function (d) {
                  var woy = parseInt(Dt.formats.W(d), 10);
                  var dow1_1 = (new Date('' + d.getFullYear() + '/1/1')).getDay();
                  // First week is 01 and not 00 as in the case of %U and %W,
                  // so we add 1 to the final result except if day 1 of the year
                  // is a Monday (then %W returns 01).
                  // We also need to subtract 1 if the day 1 of the year is 
                  // Friday-Sunday, so the resulting equation becomes:
                  var idow = woy + (dow1_1 > 4 || dow1_1 <= 1 ? 0 : 1);
                  if(idow === 53 && (new Date('' + d.getFullYear() + '/12/31')).getDay() < 4)
                  {
                      idow = 1;
                  }
                  else if(idow === 0)
                  {
                      idow = Dt.formats.V(new Date('' + (d.getFullYear()-1) + '/12/31'));
                  }
      
                  return xPad(idow, 0);
              },
          w: 'getDay',
          W: function (d) {
                  var doy = parseInt(Dt.formats.j(d), 10);
                  var rdow = 7-Dt.formats.u(d);
                  var woy = parseInt((doy+rdow)/7, 10);
                  return xPad(woy, 0, 10);
              },
          y: function (d) { return xPad(d.getFullYear()%100, 0); },
          Y: 'getFullYear',
          z: function (d) {
                  var o = d.getTimezoneOffset();
                  var H = xPad(parseInt(Math.abs(o/60), 10), 0);
                  var M = xPad(Math.abs(o%60), 0);
                  return (o>0?'-':'+') + H + M;
              },
          Z: function (d) {
  		var tz = d.toString().replace(/^.*:\d\d( GMT[+-]\d+)? \(?([A-Za-z ]+)\)?\d*$/, '$2').replace(/[a-z ]/g, '');
  		if(tz.length > 4) {
  			tz = Dt.formats.z(d);
  		}
  		return tz;
  	},
          '%': function (d) { return '%'; }
      },
  
      aggregates: {
          c: 'locale',
          D: '%m/%d/%y',
          F: '%Y-%m-%d',
          h: '%b',
          n: '\n',
          r: 'locale',
          R: '%H:%M',
          t: '\t',
          T: '%H:%M:%S',
          x: 'locale',
          X: 'locale'
          //'+': '%a %b %e %T %Z %Y'
      },
  
       /**
       * Takes a native JavaScript Date and formats to string for display to user.
       *
       * @method format
       * @param oDate {Date} Date.
       * @param oConfig {Object} (Optional) Object literal of configuration values:
       *  <dl>
       *   <dt>format &lt;String&gt;</dt>
       *   <dd>
       *   <p>
       *   Any strftime string is supported, such as "%I:%M:%S %p". strftime has several format specifiers defined by the Open group at 
       *   <a href="http://www.opengroup.org/onlinepubs/007908799/xsh/strftime.html">http://www.opengroup.org/onlinepubs/007908799/xsh/strftime.html</a>
       *   </p>
       *   <p>   
       *   PHP added a few of its own, defined at <a href="http://www.php.net/strftime">http://www.php.net/strftime</a>
       *   </p>
       *   <p>
       *   This javascript implementation supports all the PHP specifiers and a few more.  The full list is below:
       *   </p>
       *   <dl>
       *    <dt>%a</dt> <dd>abbreviated weekday name according to the current locale</dd>
       *    <dt>%A</dt> <dd>full weekday name according to the current locale</dd>
       *    <dt>%b</dt> <dd>abbreviated month name according to the current locale</dd>
       *    <dt>%B</dt> <dd>full month name according to the current locale</dd>
       *    <dt>%c</dt> <dd>preferred date and time representation for the current locale</dd>
       *    <dt>%C</dt> <dd>century number (the year divided by 100 and truncated to an integer, range 00 to 99)</dd>
       *    <dt>%d</dt> <dd>day of the month as a decimal number (range 01 to 31)</dd>
       *    <dt>%D</dt> <dd>same as %m/%d/%y</dd>
       *    <dt>%e</dt> <dd>day of the month as a decimal number, a single digit is preceded by a space (range ' 1' to '31')</dd>
       *    <dt>%F</dt> <dd>same as %Y-%m-%d (ISO 8601 date format)</dd>
       *    <dt>%g</dt> <dd>like %G, but without the century</dd>
       *    <dt>%G</dt> <dd>The 4-digit year corresponding to the ISO week number</dd>
       *    <dt>%h</dt> <dd>same as %b</dd>
       *    <dt>%H</dt> <dd>hour as a decimal number using a 24-hour clock (range 00 to 23)</dd>
       *    <dt>%I</dt> <dd>hour as a decimal number using a 12-hour clock (range 01 to 12)</dd>
       *    <dt>%j</dt> <dd>day of the year as a decimal number (range 001 to 366)</dd>
       *    <dt>%k</dt> <dd>hour as a decimal number using a 24-hour clock (range 0 to 23); single digits are preceded by a blank. (See also %H.)</dd>
       *    <dt>%l</dt> <dd>hour as a decimal number using a 12-hour clock (range 1 to 12); single digits are preceded by a blank. (See also %I.) </dd>
       *    <dt>%m</dt> <dd>month as a decimal number (range 01 to 12)</dd>
       *    <dt>%M</dt> <dd>minute as a decimal number</dd>
       *    <dt>%n</dt> <dd>newline character</dd>
       *    <dt>%p</dt> <dd>either `AM' or `PM' according to the given time value, or the corresponding strings for the current locale</dd>
       *    <dt>%P</dt> <dd>like %p, but lower case</dd>
       *    <dt>%r</dt> <dd>time in a.m. and p.m. notation equal to %I:%M:%S %p</dd>
       *    <dt>%R</dt> <dd>time in 24 hour notation equal to %H:%M</dd>
       *    <dt>%s</dt> <dd>number of seconds since the Epoch, ie, since 1970-01-01 00:00:00 UTC</dd>
       *    <dt>%S</dt> <dd>second as a decimal number</dd>
       *    <dt>%t</dt> <dd>tab character</dd>
       *    <dt>%T</dt> <dd>current time, equal to %H:%M:%S</dd>
       *    <dt>%u</dt> <dd>weekday as a decimal number [1,7], with 1 representing Monday</dd>
       *    <dt>%U</dt> <dd>week number of the current year as a decimal number, starting with the
       *            first Sunday as the first day of the first week</dd>
       *    <dt>%V</dt> <dd>The ISO 8601:1988 week number of the current year as a decimal number,
       *            range 01 to 53, where week 1 is the first week that has at least 4 days
       *            in the current year, and with Monday as the first day of the week.</dd>
       *    <dt>%w</dt> <dd>day of the week as a decimal, Sunday being 0</dd>
       *    <dt>%W</dt> <dd>week number of the current year as a decimal number, starting with the
       *            first Monday as the first day of the first week</dd>
       *    <dt>%x</dt> <dd>preferred date representation for the current locale without the time</dd>
       *    <dt>%X</dt> <dd>preferred time representation for the current locale without the date</dd>
       *    <dt>%y</dt> <dd>year as a decimal number without a century (range 00 to 99)</dd>
       *    <dt>%Y</dt> <dd>year as a decimal number including the century</dd>
       *    <dt>%z</dt> <dd>numerical time zone representation</dd>
       *    <dt>%Z</dt> <dd>time zone name or abbreviation</dd>
       *    <dt>%%</dt> <dd>a literal `%' character</dd>
       *   </dl>
       *  </dd>
       * </dl>
       * @param sLocale {String} (Optional) The locale to use when displaying days of week,
       *  months of the year, and other locale specific strings.  The following locales are
       *  built in:
       *  <dl>
       *   <dt>en</dt>
       *   <dd>English</dd>
       *   <dt>en-US</dt>
       *   <dd>US English</dd>
       *   <dt>en-GB</dt>
       *   <dd>British English</dd>
       *   <dt>en-AU</dt>
       *   <dd>Australian English (identical to British English)</dd>
       *  </dl>
       *  More locales may be added by subclassing of YAHOO.util.DateLocale.
       *  See YAHOO.util.DateLocale for more information.
       * @return {String} Formatted date for display.
       * @sa YAHOO.util.DateLocale
       */
      format : function (oDate, oConfig, sLocale) {
          oConfig = oConfig || {};
          
          if(!(oDate instanceof Date)) {
              return YAHOO.lang.isValue(oDate) ? oDate : "";
          }
  
          var format = oConfig.format || "%m/%d/%Y";
  
          // Be backwards compatible, support strings that are
          // exactly equal to YYYY/MM/DD, DD/MM/YYYY and MM/DD/YYYY
          if(format === 'YYYY/MM/DD') {
              format = '%Y/%m/%d';
          } else if(format === 'DD/MM/YYYY') {
              format = '%d/%m/%Y';
          } else if(format === 'MM/DD/YYYY') {
              format = '%m/%d/%Y';
          }
          // end backwards compatibility block
   
          sLocale = sLocale || "en";
  
          // Make sure we have a definition for the requested locale, or default to en.
          if(!(sLocale in YAHOO.util.DateLocale)) {
              if(sLocale.replace(/-[a-zA-Z]+$/, '') in YAHOO.util.DateLocale) {
                  sLocale = sLocale.replace(/-[a-zA-Z]+$/, '');
              } else {
                  sLocale = "en";
              }
          }
  
          var aLocale = YAHOO.util.DateLocale[sLocale];
  
          var replace_aggs = function (m0, m1) {
              var f = Dt.aggregates[m1];
              return (f === 'locale' ? aLocale[m1] : f);
          };
  
          var replace_formats = function (m0, m1) {
              var f = Dt.formats[m1];
              if(typeof f === 'string') {             // string => built in date function
                  return oDate[f]();
              } else if(typeof f === 'function') {    // function => our own function
                  return f.call(oDate, oDate, aLocale);
              } else if(typeof f === 'object' && typeof f[0] === 'string') {  // built in function with padding
                  return xPad(oDate[f[0]](), f[1]);
              } else {
                  return m1;
              }
          };
  
          // First replace aggregates (run in a loop because an agg may be made up of other aggs)
          while(format.match(/%[cDFhnrRtTxX]/)) {
              format = format.replace(/%([cDFhnrRtTxX])/g, replace_aggs);
          }
  
          // Now replace formats (do not run in a loop otherwise %%a will be replace with the value of %a)
          var str = format.replace(/%([aAbBCdegGHIjklmMpPsSuUVwWyYzZ%])/g, replace_formats);
  
          replace_aggs = replace_formats = undefined;
  
          return str;
      }
   };
   
   YAHOO.namespace("YAHOO.util");
   YAHOO.util.Date = Dt;
  
  /**
   * The DateLocale class is a container and base class for all
   * localised date strings used by YAHOO.util.Date. It is used
   * internally, but may be extended to provide new date localisations.
   *
   * To create your own DateLocale, follow these steps:
   * <ol>
   *  <li>Find an existing locale that matches closely with your needs</li>
   *  <li>Use this as your base class.  Use YAHOO.util.DateLocale if nothing
   *   matches.</li>
   *  <li>Create your own class as an extension of the base class using
   *   YAHOO.lang.merge, and add your own localisations where needed.</li>
   * </ol>
   * See the YAHOO.util.DateLocale['en-US'] and YAHOO.util.DateLocale['en-GB']
   * classes which extend YAHOO.util.DateLocale['en'].
   *
   * For example, to implement locales for French french and Canadian french,
   * we would do the following:
   * <ol>
   *  <li>For French french, we have no existing similar locale, so use
   *   YAHOO.util.DateLocale as the base, and extend it:
   *   <pre>
   *      YAHOO.util.DateLocale['fr'] = YAHOO.lang.merge(YAHOO.util.DateLocale, {
   *          a: ['dim', 'lun', 'mar', 'mer', 'jeu', 'ven', 'sam'],
   *          A: ['dimanche', 'lundi', 'mardi', 'mercredi', 'jeudi', 'vendredi', 'samedi'],
   *          b: ['jan', 'f&eacute;v', 'mar', 'avr', 'mai', 'jun', 'jui', 'ao&ucirc;', 'sep', 'oct', 'nov', 'd&eacute;c'],
   *          B: ['janvier', 'f&eacute;vrier', 'mars', 'avril', 'mai', 'juin', 'juillet', 'ao&ucirc;t', 'septembre', 'octobre', 'novembre', 'd&eacute;cembre'],
   *          c: '%a %d %b %Y %T %Z',
   *          p: ['', ''],
   *          P: ['', ''],
   *          x: '%d.%m.%Y',
   *          X: '%T'
   *      });
   *   </pre>
   *  </li>
   *  <li>For Canadian french, we start with French french and change the meaning of \%x:
   *   <pre>
   *      YAHOO.util.DateLocale['fr-CA'] = YAHOO.lang.merge(YAHOO.util.DateLocale['fr'], {
   *          x: '%Y-%m-%d'
   *      });
   *   </pre>
   *  </li>
   * </ol>
   *
   * With that, you can use your new locales:
   * <pre>
   *    var d = new Date("2008/04/22");
   *    YAHOO.util.Date.format(d, {format: "%A, %d %B == %x"}, "fr");
   * </pre>
   * will return:
   * <pre>
   *    mardi, 22 avril == 22.04.2008
   * </pre>
   * And
   * <pre>
   *    YAHOO.util.Date.format(d, {format: "%A, %d %B == %x"}, "fr-CA");
   * </pre>
   * Will return:
   * <pre>
   *   mardi, 22 avril == 2008-04-22
   * </pre>
   * @namespace YAHOO.util
   * @requires yahoo
   * @class DateLocale
   */
   YAHOO.util.DateLocale = {
          a: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
          A: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
          b: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
          B: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
          c: '%a %d %b %Y %T %Z',
          p: ['AM', 'PM'],
          P: ['am', 'pm'],
          r: '%I:%M:%S %p',
          x: '%d/%m/%y',
          X: '%T'
   };
  
   YAHOO.util.DateLocale['en'] = YAHOO.lang.merge(YAHOO.util.DateLocale, {});
  
   YAHOO.util.DateLocale['en-US'] = YAHOO.lang.merge(YAHOO.util.DateLocale['en'], {
          c: '%a %d %b %Y %I:%M:%S %p %Z',
          x: '%m/%d/%Y',
          X: '%I:%M:%S %p'
   });
  
   YAHOO.util.DateLocale['en-GB'] = YAHOO.lang.merge(YAHOO.util.DateLocale['en'], {
          r: '%l:%M:%S %P %Z'
   });
   YAHOO.util.DateLocale['en-AU'] = YAHOO.lang.merge(YAHOO.util.DateLocale['en']);
  
  })();
  
  YAHOO.register("datasource", YAHOO.util.DataSource, {version: "2.8.1", build: "19"});
  