text: /**! @preserve
   * Original CrashKit code Copyright (c) 2009 Andrey Tarantsov, YourSway LLC (http://crashkitapp.appspot.com/)
   * Copyright (c) 2010 Colin Snover (http://zetafleet.com)
   *
   * Released under the ISC License.
   * http://opensource.org/licenses/isc-license.txt
   */
  var TraceKit = {};
  
  /**
   * TraceKit.report: cross-browser processing of unhandled exceptions
   *
   * Syntax:
   *   TraceKit.report.subscribe(function(stackInfo) { ... })
   *   TraceKit.report.unsubscribe(function(stackInfo) { ... })
   *   TraceKit.report(exception)
   *   try { ...code... } catch(ex) { TraceKit.report(ex); }
   *
   * Supports:
   *   - Firefox: full stack trace with line numbers, plus column number
   *              on top frame; column number is not guaranteed
   *   - Opera:   full stack trace with line and column numbers
   *   - Chrome:  full stack trace with line and column numbers
   *   - Safari:  line and column number for the top frame only; some frames
   *              may be missing, and column number is not guaranteed
   *   - IE:      line and column number for the top frame only; some frames
   *              may be missing, and column number is not guaranteed
   *
   * In theory, TraceKit should work on all of the following versions:
   *   - IE5.5+ (only 8.0 tested)
   *   - Firefox 0.9+ (only 3.5+ tested)
   *   - Opera 7+ (only 10.50 tested; versions 9 and earlier may require
   *     Exceptions Have Stacktrace to be enabled in opera:config)
   *   - Safari 3+ (only 4+ tested)
   *   - Chrome 1+ (only 5+ tested)
   *   - Konqueror 3.5+ (untested)
   *
   * Requires TraceKit.computeStackTrace.
   *
   * Tries to catch all unhandled exceptions and report them to the
   * subscribed handlers. Please note that TraceKit.report will rethrow the
   * exception. This is REQUIRED in order to get a useful stack trace in IE.
   * If the exception does not reach the top of the browser, you will only
   * get a stack trace from the point where TraceKit.report was called.
   *
   * Handlers receive a stackInfo object as described in the
   * TraceKit.computeStackTrace docs.
   */
  TraceKit.report = (function () {
  	var handlers = [],
  		lastException = null,
  		lastExceptionStack = null;
  
  	/**
  	 * Add a crash handler.
  	 * @param {Function} handler
  	 */
  	function subscribe(handler) {
  		handlers.push(handler);
  	}
  
  	/**
  	 * Remove a crash handler.
  	 * @param {Function} handler
  	 */
  	function unsubscribe(handler) {
  		for (var i = handlers.length - 1; i >= 0; --i) {
  			if (handlers[i] === handler) {
  				handlers.splice(i, 1);
  			}
  		}
  	}
  
  	/**
  	 * Dispatch stack information to all handlers.
  	 * @param {Object.<string, *>} stack
     * @param {Error} e
  	 */
  	function notifyHandlers(stack, e) {
  		var exception = null;
  		for (var i in handlers) {
  			if (handlers.hasOwnProperty(i)) {
  				try {
  					handlers[i](stack, e);
  				}
  				catch (inner) {
  					exception = inner;
  				}
  			}
  		}
  
  		if (exception) {
  			throw exception;
  		}
  	}
  
  	var _oldOnerrorHandler = window.onerror;
  
  	/**
  	 * Ensures all global unhandled exceptions are recorded.
  	 * Supported by Gecko and IE.
  	 * @param {string} message Error message.
  	 * @param {string} url URL of script that generated the exception.
  	 * @param {(number|string)} lineNo The line number at which the error
  	 * occurred.
  	 */
  	window.onerror = function (message, url, lineNo) {
  		var stack = null;
  
  		if (lastExceptionStack) {
  			TraceKit.computeStackTrace.augmentStackTraceWithInitialElement(lastExceptionStack, url, lineNo, message);
  			stack = lastExceptionStack;
  			lastExceptionStack = null;
  			lastException = null;
  		}
  		else {
  			var location = { 'url': url, 'line': lineNo };
  			location.func = TraceKit.computeStackTrace.guessFunctionName(location.url, location.line);
  			location.context = TraceKit.computeStackTrace.gatherContext(location.url, location.line);
  			stack = { 'mode': 'onerror', 'message': message, 'stack': [ location ] };
  		}
  
  		notifyHandlers(stack, null);
  
  		if (_oldOnerrorHandler) {
  			return _oldOnerrorHandler.apply(this, arguments);
  		}
  
  		return false;
  	};
  
  	/**
  	 * Reports an unhandled Error to TraceKit.
  	 * @param {Error} ex
  	 */
  	function report(ex) {
  		if (lastExceptionStack) {
  			if (lastException === ex) {
  				return; // already caught by an inner catch block, ignore
  			}
  			else {
  				var s = lastExceptionStack;
  				lastExceptionStack = null;
  				lastException = null;
  				notifyHandlers(s, ex);
  			}
  		}
  
  		var stack = TraceKit.computeStackTrace(ex);
  		lastExceptionStack = stack;
  		lastException = ex;
  
  		// If the stack trace is incomplete, wait for 2 seconds for
  		// slow slow IE to see if onerror occurs or not before reporting
  		// this exception; otherwise, we will end up with an incomplete
  		// stack trace
  		window.setTimeout(function () {
  			if (lastException === ex) {
  				lastExceptionStack = null;
  				lastException = null;
  				notifyHandlers(stack, ex);
  			}
  		}, (stack.incomplete ? 2000 : 0));
  
  		throw ex; // re-throw to propagate to the top level (and cause window.onerror)
  	}
  
  	report.subscribe = subscribe;
  	report.unsubscribe = unsubscribe;
  	return report;
  }());
  
  /**
   * TraceKit.computeStackTrace: cross-browser stack traces in JavaScript
   *
   * Syntax:
   *   s = TraceKit.computeStackTrace.ofCaller([depth])
   *   s = TraceKit.computeStackTrace(exception) // consider using TraceKit.report instead (see below)
   * Returns:
   *   s.name              - exception name
   *   s.message           - exception message
   *   s.stack[i].url      - JavaScript or HTML file URL
   *   s.stack[i].func     - function name, or empty for anonymous functions (if guessing did not work)
   *   s.stack[i].args     - arguments passed to the function, if known
   *   s.stack[i].line     - line number, if known
   *   s.stack[i].column   - column number, if known
   *   s.stack[i].context  - an array of source code lines; the middle element corresponds to the correct line#
   *   s.mode              - 'stack', 'stacktrace', 'multiline', 'callers', 'onerror', or 'failed' -- method used to collect the stack trace
   *
   * Supports:
   *   - Firefox:  full stack trace with line numbers and unreliable column
   *               number on top frame
   *   - Opera 10: full stack trace with line and column numbers
   *   - Opera 9-: full stack trace with line numbers
   *   - Chrome:   full stack trace with line and column numbers
   *   - Safari:   line and column number for the topmost stacktrace element
   *               only
   *   - IE:       no line numbers whatsoever
   *
   * Tries to guess names of anonymous functions by looking for assignments
   * in the source code. In IE and Safari, we have to guess source file names
   * by searching for function bodies inside all page scripts. This will not
   * work for scripts that are loaded cross-domain.
   * Here be dragons: some function names may be guessed incorrectly, and
   * duplicate functions may be mismatched.
   *
   * TraceKit.computeStackTrace should only be used for tracing purposes.
   * Logging of unhandled exceptions should be done with TraceKit.report,
   * which builds on top of TraceKit.computeStackTrace and provides better
   * IE support by utilizing the window.onerror event to retrieve information
   * about the top of the stack.
   *
   * Note: In IE and Safari, no stack trace is recorded on the Error object,
   * so computeStackTrace instead walks its *own* chain of callers.
   * This means that:
   *  * in Safari, some methods may be missing from the stack trace;
   *  * in IE, the topmost function in the stack trace will always be the
   *    caller of computeStackTrace.
   *
   * This is okay for tracing (because you are likely to be calling
   * computeStackTrace from the function you want to be the topmost element
   * of the stack trace anyway), but not okay for logging unhandled
   * exceptions (because your catch block will likely be far away from the
   * inner function that actually caused the exception).
   *
   * Tracing example:
   *     function trace(message) {
   *         var stackInfo = TraceKit.computeStackTrace.ofCaller();
   *         var data = message + "\n";
   *         for(var i in stackInfo.stack) {
   *             var item = stackInfo.stack[i];
   *             data += (item.func || '[anonymous]') + "() in " + item.url + ":" + (item.line || '0') + "\n";
   *         }
   *         if (window.console)
   *             console.info(data);
   *         else
   *             alert(data);
   *     }
   */
  TraceKit.computeStackTrace = (function () {
  	var debug = false, sourceCache = {};
  
  	/**
  	 * Attempts to retrieve source code via XMLHttpRequest, which is used
  	 * to look up anonymous function names.
  	 * @param {string} url URL of source code.
  	 * @return {string} Source contents.
  	 */
  	function loadSource(url) {
  		try {
  			if (XMLHttpRequest === undefined) { // IE 5.x-6.x:
  				XMLHttpRequest = function () {
  					try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch(e) {}
  					try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch(e) {}
  					try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) {}
  					try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {}
  					throw new Error('No XHR.');
  				};
  			}
  
  			var request = new XMLHttpRequest();
  			request.open('GET', url, false);
  			request.send('');
  			return request.responseText;
  		}
  		catch (e) {
  			return '';
  		}
  	}
  
  	/**
  	 * Retrieves source code from the source code cache.
  	 * @param {string} url URL of source code.
  	 * @return {Array.<string>} Source contents.
  	 */
  	function getSource(url) {
  		if (!sourceCache.hasOwnProperty(url)) {
  			// URL needs to be able to fetched within the acceptable domain.  Otherwise,
  			// cross-domain errors will be triggered.
  			var source;
  			var urlTokens = url.split('/');
  			if (urlTokens.length > 2 && urlTokens[2] === document.domain) {
  				source = loadSource(url);
  			} else {
  				source = [];
  			}
  			sourceCache[url] = source.length ? source.split("\n") : [];
  		}
  
  		return sourceCache[url];
  	}
  
  	/**
  	 * Tries to use an externally loaded copy of source code to determine
  	 * the name of a function by looking at the name of the variable it was
  	 * assigned to, if any.
  	 * @param {string} url URL of source code.
  	 * @param {(string|number)} lineNo Line number in source code.
  	 * @return {string} The function name, if discoverable.
  	 */
  	function guessFunctionName(url, lineNo) {
  		var reFunctionArgNames = /function ([^(]*)\(([^)]*)\)/,
  			reGuessFunction = /['"]?([0-9A-Za-z$_]+)['"]?\s*[:=]\s*(function|eval|new Function)/,
  			line = '',
  			maxLines = 10,
  			source = getSource(url),
  			m;
  
  		if (!source.length) {
  			return '?';
  		}
  
  		// Walk backwards from the first line in the function until we find the line which
  		// matches the pattern above, which is the function definition
  		for (var i = 0; i < maxLines; ++i) {
  			line = source[lineNo - i] + line;
  
  			if (line !== undefined) {
  				if ((m = reGuessFunction.exec(line))) {
  					return m[1];
  				}
  				else if ((m = reFunctionArgNames.exec(line))) {
  					return m[1];
  				}
  			}
  		}
  
  		return '?';
  	}
  
  	/**
  	 * Retrieves the surrounding lines from where an exception occurred.
  	 * @param {string} url URL of source code.
  	 * @param {(string|number)} line Line number in source code to centre
  	 * around for context.
  	 * @return {?Array.<string>} Lines of source code.
  	 */
  	function gatherContext(url, line) {
  		var source = getSource(url),
  			context = [],
  			hasContext = false;
  
  		if (!source.length) {
  			return null;
  		}
  
  		line -= 1; // convert to 0-based index
  
  		for (var i = line - 2, j = line + 2; i < j; ++i) {
  			context.push(source[i]);
  			if (source[i] !== undefined) {
  				hasContext = true;
  			}
  		}
  
  		return hasContext ? context : null;
  	}
  
  	/**
  	 * Escapes special characters, except for whitespace, in a string to be
  	 * used inside a regular expression as a string literal.
  	 * @param {string} text The string.
  	 * @return {string} The escaped string literal.
  	 */
  	function escapeRegExp(text) {
  		return text.replace(/[\-\[\]{}()*+?.,\\\^$|#]/g, '\\$&');
  	}
  
  	/**
  	 * Escapes special characters in a string to be used inside a regular
  	 * expression as a string literal. Also ensures that HTML entities will
  	 * be matched the same as their literal friends.
  	 * @param {string} body The string.
  	 * @return {string} The escaped string.
  	 */
  	function escapeCodeAsRegExpForMatchingInsideHTML(body) {
  		return escapeRegExp(body).replace('<', '(?:<|&lt;)').replace('>', '(?:>|&gt;)')
  				.replace('&', '(?:&|&amp;)').replace('"', '(?:"|&quot;)').replace(/\s+/g, '\\s+');
  	}
  
  	/**
  	 * Determines where a code fragment occurs in the source code.
  	 * @param {RegExp} re The function definition.
  	 * @param {Array.<string>} urls A list of URLs to search.
  	 * @return {?Object.<string, (string|number)>} An object containing
  	 * the url, line, and column number of the defined function.
  	 */
  	function findSourceInUrls(re, urls) {
  		var source, m;
  		for (var i = 0, j = urls.length; i < j; ++i) {
  			// console.log('searching', urls[i]);
  			if ((source = getSource(urls[i])).length) {
  				source = source.join("\n");
  				if ((m = re.exec(source))) {
  					// console.log('Found function in ' + urls[i]);
  
  					return {
  						'url': urls[i],
  						'line': source.substring(0, m.index).split("\n").length,
  						'column': m.index - source.lastIndexOf("\n", m.index) - 1
  					};
  				}
  			}
  		}
  
  		// console.log('no match');
  
  		return null;
  	}
  
  	/**
  	 * Determines at which column a code fragment occurs on a line of the
  	 * source code.
  	 * @param {string} fragment The code fragment.
  	 * @param {string} url The URL to search.
  	 * @param {(string|number)} line The line number to examine.
  	 * @return {?number} The column number.
  	 */
  	function findSourceInLine(fragment, url, line) {
  		var source = getSource(url),
  			re = new RegExp('\\b' + escapeRegExp(fragment) + '\\b'),
  			m;
  
  		line -= 1;
  
  		if (source && source.length > line && (m = re.exec(source[line]))) {
  			return m.index;
  		}
  
  		return null;
  	}
  
  	/**
  	 * Determines where a function was defined within the source code.
  	 * @param {(Function|string)} func A function reference or serialized
  	 * function definition.
  	 * @return {?Object.<string, (string|number)>} An object containing
  	 * the url, line, and column number of the defined function.
  	 */
  	function findSourceByFunctionBody(func) {
  		var urls = [ window.location.href ],
  			scripts = document.getElementsByTagName("script"),
  			body,
  			code = '' + func,
  			codeRE = /^function(?:\s+([\w$]+))?\s*\(([\w\s,]*)\)\s*\{\s*(\S[\s\S]*\S)\s*\}\s*$/,
  			eventRE = /^function on([\w$]+)\s*\(event\)\s*\{\s*(\S[\s\S]*\S)\s*\}\s*$/,
  			re,
  			parts,
  			result;
  
  		for (var i = 0; i < scripts.length; ++i) {
  			var script = scripts[i];
  			if (script.src) {
  				urls.push(script.src);
  			}
  		}
  
  		if (!(parts = codeRE.exec(code))) {
  			re = new RegExp(escapeRegExp(code).replace(/\s+/g, '\\s+'));
  		}
  
  		// not sure if this is really necessary, but I don’t have a test
  		// corpus large enough to confirm that and it was in the original.
  		else {
  			var name = parts[1] ? '\\s+' + parts[1] : '',
  				args = parts[2].split(",").join("\\s*,\\s*");
  
  			body = escapeRegExp(parts[3])
  				.replace(/;$/, ';?') // semicolon is inserted if the function ends with a comment
  				.replace(/\s+/g, '\\s+');
  			re = new RegExp("function" + name + "\\s*\\(\\s*" + args + "\\s*\\)\\s*{\\s*" + body + "\\s*}");
  		}
  
  		// look for a normal function definition
  		if ((result = findSourceInUrls(re, urls))) {
  			return result;
  		}
  
  		// look for an old-school event handler function
  		if ((parts = eventRE.exec(code))) {
  			var event = parts[1];
  			body = escapeCodeAsRegExpForMatchingInsideHTML(parts[2]);
  
  			// look for a function defined in HTML as an onXXX handler
  			re = new RegExp("on" + event + '=[\\\'"]\\s*' + body + '\\s*[\\\'"]', 'i');
  
  			if ((result = findSourceInUrls(re, urls[0]))) {
  				return result;
  			}
  
  			// look for ???
  			re = new RegExp(body);
  
  			if ((result = findSourceInUrls(re, urls))) {
  				return result;
  			}
  		}
  
  		return null;
  	}
  
  	// Contents of Exception in various browsers.
  	//
  	// SAFARI:
  	// ex.message = Can't find variable: qq
  	// ex.line = 59
  	// ex.sourceId = 580238192
  	// ex.sourceURL = http://...
  	// ex.expressionBeginOffset = 96
  	// ex.expressionCaretOffset = 98
  	// ex.expressionEndOffset = 98
  	// ex.name = ReferenceError
  	//
  	// FIREFOX:
  	// ex.message = qq is not defined
  	// ex.fileName = http://...
  	// ex.lineNumber = 59
  	// ex.stack = ...stack trace... (see the example below)
  	// ex.name = ReferenceError
  	//
  	// CHROME:
  	// ex.message = qq is not defined
  	// ex.name = ReferenceError
  	// ex.type = not_defined
  	// ex.arguments = ['aa']
  	// ex.stack = ...stack trace...
  	//
  	// INTERNET EXPLORER:
  	// ex.message = ...
  	// ex.name = ReferenceError
  	//
  	// OPERA:
  	// ex.message = ...message... (see the example below)
  	// ex.name = ReferenceError
  	// ex.opera#sourceloc = 11  (pretty much useless, duplicates the info in ex.message)
  	// ex.stacktrace = n/a; see 'opera:config#UserPrefs|Exceptions Have Stacktrace'
  
  	/**
  	 * Computes stack trace information from the stack property.
  	 * Chrome and Gecko use this property.
  	 * @param {Error} ex
  	 * @return {?Object.<string, *>} Stack trace information.
  	 */
  	function computeStackTraceFromStackProp(ex) {
  		if (!ex.stack) {
  			return null;
  		}
  
  		var chrome = /^\s*at (\S+) \(((?:file|http):.*?):(\d+)(?::(\d+))?\)\s*$/i,
  			gecko = /^\s*(\S*)(?:\((.*?)\))?@((?:file|http).*?):(\d+)(?::(\d+))?\s*$/i,
  			lines = ex.stack.split("\n"),
  			stack = [],
  			parts,
  			element,
  			reference = /^(.*) is undefined$/.exec(ex.message);
  
  		for (var i = 0, j = lines.length; i < j; ++i) {
  			if ((parts = gecko.exec(lines[i]))) {
  				element = { 'url': parts[3], 'func': parts[1], 'args': parts[2] ? parts[2].split(',') : '', 'line': +parts[4], 'column': parts[5] ? +parts[5] : null };
  			}
  			else if ((parts = chrome.exec(lines[i]))) {
  				element = { 'url': parts[2], 'func': parts[1], 'line': +parts[3], 'column': parts[4] ? +parts[4] : null };
  			}
  			else {
  				continue;
  			}
  
  			if (!element.func && element.line) {
  				element.func = guessFunctionName(element.url, element.line);
  			}
  
  			if (element.line) {
  				element.context = gatherContext(element.url, element.line);
  			}
  
  			stack.push(element);
  		}
  
  		if (stack[0] && stack[0].line && !stack[0].column && reference) {
  			stack[0].column = findSourceInLine(reference[1], stack[0].url, stack[0].line);
  		}
  
  		if (!stack.length) {
  			return null;
  		}
  
  		return {
  			'mode': 'stack',
  			'name': ex.name,
  			'message': ex.message,
  			'stack': stack
  		};
  	}
  
  	/**
  	 * Computes stack trace information from the stacktrace property.
  	 * Opera 10 uses this property.
  	 * @param {Error} ex
  	 * @return {?Object.<string, *>} Stack trace information.
  	 */
  	function computeStackTraceFromStacktraceProp(ex) {
  		// Access and store the stacktrace property before doing ANYTHING
  		// else to it because Opera is not very good at providing it
  		// reliably in other circumstances.
  		var stacktrace = ex.stacktrace;
  
  		var testRE = / line (\d+), column (\d+) in (?:<anonymous function: ([^>]+)>|([^\)]+))\((.*)\) in (.*):\s*$/i,
  			lines = stacktrace.split("\n"),
  			stack = [],
  			parts;
  
  		for (var i = 0, j = lines.length; i < j; i += 2) {
  			if ((parts = testRE.exec(lines[i]))) {
  				var element = { 'line': +parts[1], 'column': +parts[2], 'func': parts[3] || parts[4], 'args': parts[5] ? parts[5].split(',') : [], 'url': parts[6] };
  
  				if (!element.func && element.line) {
  					element.func = guessFunctionName(element.url, element.line);
  				}
  				if (element.line) {
  					try {
  						element.context = gatherContext(element.url, element.line);
  					}
  					catch (exc) {}
  				}
  
  				if (!element.context) {
  					element.context = [ lines[i + 1] ];
  				}
  
  				stack.push(element);
  			}
  		}
  
  		if (!stack.length) {
  			return null;
  		}
  
  		return {
  			'mode': 'stacktrace',
  			'name': ex.name,
  			'message': ex.message,
  			'stack': stack
  		};
  	}
  
  	/**
  	 * NOT TESTED.
  	 * Computes stack trace information from an error message that includes
  	 * the stack trace.
  	 * Opera 9 and earlier use this method if the option to show stack
  	 * traces is turned on in opera:config.
  	 * @param {Error} ex
  	 * @return {?Object.<string, *>} Stack information.
  	 */
  	function computeStackTraceFromOperaMultiLineMessage(ex) {
  		// Opera includes a stack trace into the exception message. An example is:
  		//
  		// Statement on line 3: Undefined variable: undefinedFunc
  		// Backtrace:
  		//   Line 3 of linked script file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.js: In function zzz
  		//         undefinedFunc(a);
  		//   Line 7 of inline#1 script in file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.html: In function yyy
  		//           zzz(x, y, z);
  		//   Line 3 of inline#1 script in file://localhost/Users/andreyvit/Projects/TraceKit/javascript-client/sample.html: In function xxx
  		//           yyy(a, a, a);
  		//   Line 1 of function script
  		//     try { xxx('hi'); return false; } catch(ex) { TraceKit.report(ex); }
  		//   ...
  
  		var lines = ex.message.split('\n');
  		if (lines.length < 4) {
  			return null;
  		}
  
  		var lineRE1 = /^\s*Line (\d+) of linked script ((?:file|http)\S+)(?:: in function (\S+))?\s*$/i,
  			lineRE2 = /^\s*Line (\d+) of inline#(\d+) script in ((?:file|http)\S+)(?:: in function (\S+))?\s*$/i,
  			lineRE3 = /^\s*Line (\d+) of function script\s*$/i,
  			stack = [],
  			scripts = document.getElementsByTagName('script'),
  			inlineScriptBlocks = [],
  			parts,
  			i,
  			len,
  			source;
  
  		for (i in scripts) {
  			if (scripts.hasOwnProperty(i) && !scripts[i].src) {
  				inlineScriptBlocks.push(scripts[i]);
  			}
  		}
  
  		for (i = 2, len = lines.length; i < len; i += 2) {
  			var item = null;
  			if ((parts = lineRE1.exec(lines[i]))) {
  				item = { 'url': parts[2], 'func': parts[3], 'line': +parts[1] };
  			}
  			else if ((parts = lineRE2.exec(lines[i]))) {
  				item = { 'url': parts[3], 'func': parts[4] };
  				var relativeLine = (+parts[1]);  // relative to the start of the <SCRIPT> block
  				var script = inlineScriptBlocks[parts[2] - 1];
  				if (script) {
  					source = getSource(item.url);
  					if (source) {
  						source = source.join("\n");
  						var pos = source.indexOf(script.innerText);
  						if (pos >= 0) {
  							item.line = relativeLine + source.substring(0, pos).split("\n").length;
  						}
  					}
  				}
  			}
  			else if ((parts = lineRE3.exec(lines[i]))) {
  				var url = window.location.href.replace(/#.*$/, ''), line = parts[1];
  				var re = new RegExp(escapeCodeAsRegExpForMatchingInsideHTML(lines[i + 1]));
  				source = findSourceInUrls(re, [url]);
  				item = { 'url': url, 'line': source ? source.line : line, 'func': '' };
  			}
  
  			if (item) {
  				if (!item.func) {
  					item.func = guessFunctionName(item.url, item.line);
  				}
  				var context = gatherContext(item.url, item.line);
  				var midline = (context ? context[Math.floor(context.length / 2)] : null);
  				if (context && midline.replace(/^\s*/, '') === lines[i + 1].replace(/^\s*/, '')) {
  					item.context = context;
  				}
  				else {
  					// if (context) alert("Context mismatch. Correct midline:\n" + lines[i+1] + "\n\nMidline:\n" + midline + "\n\nContext:\n" + context.join("\n") + "\n\nURL:\n" + item.url);
  					item.context = [lines[i + 1]];
  				}
  				stack.push(item);
  			}
  		}
  		if (!stack.length) {
  			return null; // could not parse multiline exception message as Opera stack trace
  		}
  
  		return {
  			'mode': 'multiline',
  			'name': ex.name,
  			'message': lines[0],
  			'stack': stack
  		};
  	}
  
  	/**
  	 * Adds information about the first frame to incomplete stack traces.
  	 * Safari and IE require this to get complete data on the first frame.
  	 * @param {Object.<string, *>} stackInfo Stack trace information from
  	 * one of the compute* methods.
  	 * @param {string} url The URL of the script that caused an error.
  	 * @param {(number|string)} lineNo The line number of the script that
  	 * caused an error.
  	 * @param {string=} message The error generated by the browser, which
  	 * hopefully contains the name of the object that caused the error.
  	 * @return {boolean} Whether or not the stack information was
  	 * augmented.
  	 */
  	function augmentStackTraceWithInitialElement(stackInfo, url, lineNo, message) {
  		var initial = {
  			'url': url,
  			'line': lineNo
  		};
  
  		if (initial.url && initial.line) {
  			stackInfo.incomplete = false;
  
  			if (!initial.func) {
  				initial.func = guessFunctionName(initial.url, initial.line);
  			}
  
  			if (!initial.context) {
  			initial.context = gatherContext(initial.url, initial.line);
  			}
  
  			var reference = / '([^']+)' /.exec(message);
  			if (reference) {
  				initial.column = findSourceInLine(reference[1], initial.url, initial.line);
  			}
  
  			if (stackInfo.stack.length > 0) {
  				if (stackInfo.stack[0].url === initial.url) {
  					if (stackInfo.stack[0].line === initial.line) {
  						return false; // already in stack trace
  					}
  					else if (!stackInfo.stack[0].line && stackInfo.stack[0].func === initial.func) {
  						stackInfo.stack[0].line = initial.line;
  						stackInfo.stack[0].context = initial.context;
  						return false;
  					}
  				}
  			}
  
  			stackInfo.stack.unshift(initial);
  			stackInfo.partial = true;
  			return true;
  		}
  		else {
  			stackInfo.incomplete = true;
  		}
  
  		return false;
  	}
  
  	/**
  	 * Computes stack trace information by walking the arguments.caller
  	 * chain at the time the exception occurred. This will cause earlier
  	 * frames to be missed but is the only way to get any stack trace in
  	 * Safari and IE. The top frame is restored by
  	 * {@link augmentStackTraceWithInitialElement}.
  	 * @param {Error} ex
  	 * @return {?Object.<string, *>} Stack trace information.
  	 */
  	function computeStackTraceByWalkingCallerChain(ex, depth) {
  		var functionName = /function\s+([_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*)?\s*\(/i,
  		stack = [],
  		funcs = {},
  		recursion = false,
  		parts,
  		item,
  		source;
  
  		for (var curr = arguments.callee.caller; curr && !recursion; curr = curr.caller) {
  			if (curr === computeStackTrace || curr === TraceKit.report) {
  				// console.log('skipping internal function');
  				continue;
  			}
  
  			item = {
  				'url': null,
  				'func': '?',
  				'line': null,
  				'column': null
  			};
  
  			if (curr.name) {
  				item.func = curr.name;
  			}
  			else if ((parts = functionName.exec(curr.toString()))) {
  				item.func = parts[1];
  			}
  
  			if ((source = findSourceByFunctionBody(curr))) {
  				item.url = source.url;
  				item.line = source.line;
  
  				if (item.func === '?') {
  					item.func = guessFunctionName(item.url, item.line);
  				}
  
  				var reference = / '([^']+)' /.exec(ex.message || ex.description);
  				if (reference) {
  					item.column = findSourceInLine(reference[1], source.url, source.line);
  				}
  			}
  
  			if (funcs['' + curr]) {
  				item.recursion = true;
  			}
  
  			stack.push(item);
  		}
  
  		if (depth) {
  			// console.log('depth is ' + depth);
  			// console.log('stack is ' + stack.length);
  			stack.splice(0, depth);
  		}
  
  		var result = { 'mode': 'callers', 'name': ex.name, 'message': ex.message, 'stack': stack };
  		augmentStackTraceWithInitialElement(result, ex.sourceURL || ex.fileName, ex.line || ex.lineNumber, ex.message || ex.description);
  		return result;
  	}
  
  	/**
  	 * Computes a stack trace for an exception.
  	 * @param {Error} ex
  	 * @param {(string|number)=} depth
  	 */
  	function computeStackTrace(ex, depth) {
  		var stack = null;
  		depth = (depth === undefined ? 0 : +depth);
  
  		try {
  			// This must be tried first because Opera 10 *destroys*
  			// its stacktrace property if you try to access the stack
  			// property first!!
  			stack = computeStackTraceFromStacktraceProp(ex);
  			if (stack) {
  				return stack;
  			}
  		}
  		catch (e) {
  			if (debug) {
  				throw e;
  			}
  		}
  
  		try {
  			stack = computeStackTraceFromStackProp(ex);
  			if (stack) {
  				return stack;
  			}
  		}
  		catch (e) {
  			if (debug) {
  				throw e;
  			}
  		}
  
  		try {
  			stack = computeStackTraceFromOperaMultiLineMessage(ex);
  			if (stack) {
  				return stack;
  			}
  		}
  		catch (e) {
  			if (debug) {
  				throw e;
  			}
  		}
  
  		try {
  			stack = computeStackTraceByWalkingCallerChain(ex, depth + 1);
  			if (stack) {
  				return stack;
  			}
  		}
  		catch (e) {
  			if (debug) {
  				throw e;
  			}
  		}
  
  		return { 'mode': 'failed' };
  	}
  
  	/**
  	 * Logs a stacktrace starting from the previous call and working down.
  	 * @param {(number|string)=} depth How many frames deep to trace.
  	 * @return {Object.<string, *>} Stack trace information.
  	 */
  	function computeStackTraceOfCaller(depth) {
  		depth = (depth === undefined ? 0 : +depth) + 1; // "+ 1" because "ofCaller" should drop one frame
  		try {
  			(0)();
  		}
  		catch (ex) {
  			return computeStackTrace(ex, depth + 1);
  		}
  
  		return null;
  	}
  
  	computeStackTrace.augmentStackTraceWithInitialElement = augmentStackTraceWithInitialElement;
  	computeStackTrace.guessFunctionName = guessFunctionName;
  	computeStackTrace.gatherContext = gatherContext;
  	computeStackTrace.ofCaller = computeStackTraceOfCaller;
  
  	return computeStackTrace;
  }());
  
  /**
   * Extends support for global error handling for asynchronous browser
   * functions.
   */
  (function (w) {
  	var slice = Array.prototype.slice,
  		_oldSetTimeout = w.setTimeout;
  
  	w.setTimeout = function () {
  		var args = slice.call(arguments, 0),
  			_oldCallback = args[0];
  
  		args[0] = function () {
  			try {
  				_oldCallback.apply(this, arguments);
  			}
  			catch (e) {
  				TraceKit.report(e);
  				throw e;
  			}
  		};
  
  		return _oldSetTimeout.apply(this, args);
  	};
  
  	// If you are reading this, you should know that setInterval is
  	// bad! Don’t use it!
  	// http://zetafleet.com/blog/why-i-consider-setinterval-harmful
  	var _oldSetInterval = w.setInterval;
  	w.setInterval = function () {
  		var args = slice.call(arguments, 0),
  			_oldCallback = args[0];
  
  		args[0] = function () {
  			try {
  				_oldCallback.apply(this, arguments);
  			}
  			catch (e) {
  				TraceKit.report(e);
  				throw e;
  			}
  		};
  
  		return _oldSetInterval.apply(this, args);
  	};
  }(window));
  
  /**
   * Extended support for backtraces and global error handling for most
   * asynchronous jQuery functions.
   */
  
  /* HACK - disabled because it causes inexplicable behavior
  (function ($) {
  
  	// quit if jQuery isn't on the page
  	if (!$) {
  		return;
  	}
  
  	var _oldEventAdd = $.event.add;
  	$.event.add = function (elem, types, handler, data) {
  		var _handler;
  
  		if (handler.handler) {
  			_handler = handler.handler;
  			handler.handler = function () {
  				try {
  					return _handler.apply(this, arguments);
  				}
  				catch (e) {
  					TraceKit.report(e);
  					throw e;
  				}
  			};
  		}
  		else {
  			_handler = handler;
  			handler = function () {
  				try {
  					return _handler.apply(this, arguments);
  				}
  				catch (e) {
  					TraceKit.report(e);
  					throw e;
  				}
  			};
  		}
  
  		// If the handler we are attaching doesn’t have the same guid as
  		// the original, it will never be removed when someone tries to
  		// unbind the original function later. Technically as a result of
  		// this our guids are no longer globally unique, but whatever, that
  		// never hurt anybody RIGHT?!
  		if (_handler.guid) {
  			handler.guid = _handler.guid;
  		}
  		else {
  			handler.guid = _handler.guid = $.guid++;
  		}
  
  		return _oldEventAdd.call(this, elem, types, handler, data);
  	};
  
  	var _oldReady = $.fn.ready;
  	$.fn.ready = function (fn) {
  		var _fn = function () {
  			try {
  				return fn.apply(this, arguments);
  			}
  			catch (e) {
  				TraceKit.report(e);
  				throw e;
  			}
  		};
  
  		return _oldReady.call(this, _fn);
  	};
  
  	var _oldAjax = $.ajax;
  	$.fn.ajax = function (s) {
  		if ($.isFunction(s.complete)) {
  			var _oldComplete = s.complete;
  			s.complete = function () {
  				try {
  					return _oldComplete.apply(this, arguments);
  				}
  				catch (e) {
  					TraceKit.report(e);
  					throw e;
  				}
  			};
  		}
  
  		if ($.isFunction(s.error)) {
  			var _oldError = s.error;
  			s.error = function () {
  				try {
  					return _oldError.apply(this, arguments);
  				}
  				catch (e) {
  					TraceKit.report(e);
  					throw e;
  				}
  			};
  		}
  
  		if ($.isFunction(s.success)) {
  			var _oldSuccess = s.success;
  			s.success = function () {
  				try {
  					return _oldSuccess.apply(this, arguments);
  				}
  				catch (e) {
  					TraceKit.report(e);
  					throw e;
  				}
  			};
  		}
  
  		try {
  			return _oldAjax.call(this, s);
  		}
  		catch (e) {
  			TraceKit.report(e);
  			throw e;
  		}
  	};
  }(window.jQuery));
  */
  