text: (function(Y) {
  /** 
   * Add style management functionality to DOM.
   * @module dom
   * @submodule dom-style
   * @for DOM
   */
  
  var DOCUMENT_ELEMENT = 'documentElement',
      DEFAULT_VIEW = 'defaultView',
      OWNER_DOCUMENT = 'ownerDocument',
      STYLE = 'style',
      FLOAT = 'float',
      CSS_FLOAT = 'cssFloat',
      STYLE_FLOAT = 'styleFloat',
      TRANSPARENT = 'transparent',
      GET_COMPUTED_STYLE = 'getComputedStyle',
      GET_BOUNDING_CLIENT_RECT = 'getBoundingClientRect',
  
      WINDOW = Y.config.win,
      DOCUMENT = Y.config.doc,
      UNDEFINED = undefined,
  
      Y_DOM = Y.DOM,
  
      TRANSFORM = 'transform',
      VENDOR_TRANSFORM = [
          'WebkitTransform',
          'MozTransform',
          'OTransform'
      ],
  
      re_color = /color$/i,
      re_unit = /width|height|top|left|right|bottom|margin|padding/i;
  
  Y.Array.each(VENDOR_TRANSFORM, function(val) {
      if (val in DOCUMENT[DOCUMENT_ELEMENT].style) {
          TRANSFORM = val;
      }
  });
  
  Y.mix(Y_DOM, {
      DEFAULT_UNIT: 'px',
  
      CUSTOM_STYLES: {
      },
  
  
      /**
       * Sets a style property for a given element.
       * @method setStyle
       * @param {HTMLElement} An HTMLElement to apply the style to.
       * @param {String} att The style property to set. 
       * @param {String|Number} val The value. 
       */
      setStyle: function(node, att, val, style) {
          style = style || node.style;
          var CUSTOM_STYLES = Y_DOM.CUSTOM_STYLES;
  
          if (style) {
              if (val === null || val === '') { // normalize unsetting
                  val = '';
              } else if (!isNaN(new Number(val)) && re_unit.test(att)) { // number values may need a unit
                  val += Y_DOM.DEFAULT_UNIT;
              }
  
              if (att in CUSTOM_STYLES) {
                  if (CUSTOM_STYLES[att].set) {
                      CUSTOM_STYLES[att].set(node, val, style);
                      return; // NOTE: return
                  } else if (typeof CUSTOM_STYLES[att] === 'string') {
                      att = CUSTOM_STYLES[att];
                  }
              } else if (att === '') { // unset inline styles
                  att = 'cssText';
                  val = '';
              }
              style[att] = val; 
          }
      },
  
      /**
       * Returns the current style value for the given property.
       * @method getStyle
       * @param {HTMLElement} An HTMLElement to get the style from.
       * @param {String} att The style property to get. 
       */
      getStyle: function(node, att, style) {
          style = style || node.style;
          var CUSTOM_STYLES = Y_DOM.CUSTOM_STYLES,
              val = '';
  
          if (style) {
              if (att in CUSTOM_STYLES) {
                  if (CUSTOM_STYLES[att].get) {
                      return CUSTOM_STYLES[att].get(node, att, style); // NOTE: return
                  } else if (typeof CUSTOM_STYLES[att] === 'string') {
                      att = CUSTOM_STYLES[att];
                  }
              }
              val = style[att];
              if (val === '') { // TODO: is empty string sufficient?
                  val = Y_DOM[GET_COMPUTED_STYLE](node, att);
              }
          }
  
          return val;
      },
  
      /**
       * Sets multiple style properties.
       * @method setStyles
       * @param {HTMLElement} node An HTMLElement to apply the styles to. 
       * @param {Object} hash An object literal of property:value pairs. 
       */
      setStyles: function(node, hash) {
          var style = node.style;
          Y.each(hash, function(v, n) {
              Y_DOM.setStyle(node, n, v, style);
          }, Y_DOM);
      },
  
      /**
       * Returns the computed style for the given node.
       * @method getComputedStyle
       * @param {HTMLElement} An HTMLElement to get the style from.
       * @param {String} att The style property to get. 
       * @return {String} The computed value of the style property. 
       */
      getComputedStyle: function(node, att) {
          var val = '',
              doc = node[OWNER_DOCUMENT],
              computed;
  
          if (node[STYLE] && doc[DEFAULT_VIEW] && doc[DEFAULT_VIEW][GET_COMPUTED_STYLE]) {
              computed = doc[DEFAULT_VIEW][GET_COMPUTED_STYLE](node, null);
              if (computed) { // FF may be null in some cases (ticket #2530548)
                  val = computed[att];
              }
          }
          return val;
      }
  });
  
  // normalize reserved word float alternatives ("cssFloat" or "styleFloat")
  if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][CSS_FLOAT] !== UNDEFINED) {
      Y_DOM.CUSTOM_STYLES[FLOAT] = CSS_FLOAT;
  } else if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][STYLE_FLOAT] !== UNDEFINED) {
      Y_DOM.CUSTOM_STYLES[FLOAT] = STYLE_FLOAT;
  }
  
  // fix opera computedStyle default color unit (convert to rgb)
  if (Y.UA.opera) {
      Y_DOM[GET_COMPUTED_STYLE] = function(node, att) {
          var view = node[OWNER_DOCUMENT][DEFAULT_VIEW],
              val = view[GET_COMPUTED_STYLE](node, '')[att];
  
          if (re_color.test(att)) {
              val = Y.Color.toRGB(val);
          }
  
          return val;
      };
  
  }
  
  // safari converts transparent to rgba(), others use "transparent"
  if (Y.UA.webkit) {
      Y_DOM[GET_COMPUTED_STYLE] = function(node, att) {
          var view = node[OWNER_DOCUMENT][DEFAULT_VIEW],
              val = view[GET_COMPUTED_STYLE](node, '')[att];
  
          if (val === 'rgba(0, 0, 0, 0)') {
              val = TRANSPARENT; 
          }
  
          return val;
      };
  
  }
  
  Y.DOM._getAttrOffset = function(node, attr) {
      var val = Y.DOM[GET_COMPUTED_STYLE](node, attr),
          offsetParent = node.offsetParent,
          position,
          parentOffset,
          offset;
  
      if (val === 'auto') {
          position = Y.DOM.getStyle(node, 'position');
          if (position === 'static' || position === 'relative') {
              val = 0;    
          } else if (offsetParent && offsetParent[GET_BOUNDING_CLIENT_RECT]) {
              parentOffset = offsetParent[GET_BOUNDING_CLIENT_RECT]()[attr];
              offset = node[GET_BOUNDING_CLIENT_RECT]()[attr];
              if (attr === 'left' || attr === 'top') {
                  val = offset - parentOffset;
              } else {
                  val = parentOffset - node[GET_BOUNDING_CLIENT_RECT]()[attr];
              }
          }
      }
  
      return val;
  };
  
  Y.DOM._getOffset = function(node) {
      var pos,
          xy = null;
  
      if (node) {
          pos = Y_DOM.getStyle(node, 'position');
          xy = [
              parseInt(Y_DOM[GET_COMPUTED_STYLE](node, 'left'), 10),
              parseInt(Y_DOM[GET_COMPUTED_STYLE](node, 'top'), 10)
          ];
  
          if ( isNaN(xy[0]) ) { // in case of 'auto'
              xy[0] = parseInt(Y_DOM.getStyle(node, 'left'), 10); // try inline
              if ( isNaN(xy[0]) ) { // default to offset value
                  xy[0] = (pos === 'relative') ? 0 : node.offsetLeft || 0;
              }
          } 
  
          if ( isNaN(xy[1]) ) { // in case of 'auto'
              xy[1] = parseInt(Y_DOM.getStyle(node, 'top'), 10); // try inline
              if ( isNaN(xy[1]) ) { // default to offset value
                  xy[1] = (pos === 'relative') ? 0 : node.offsetTop || 0;
              }
          } 
      }
  
      return xy;
  
  };
  
  Y_DOM.CUSTOM_STYLES.transform = {
      set: function(node, val, style) {
          style[TRANSFORM] = val;
      },
  
      get: function(node, style) {
          return Y_DOM[GET_COMPUTED_STYLE](node, TRANSFORM);
      }
  };
  
  
  })(Y);
  