(function() {	
	function shouldIgnore(error, url) {
		var i;

		
		var scriptURLs = [
			
			'https://graph.facebook.com',
			
			'http://connect.facebook.net/en_US/all.js',
			
			'extensions/',
			
			'http://127.0.0.1:4001/isrunning', // Cacaoweb
			'http://webappstoolbarba.texthelp.com/',
			'http://metrics.itunes.apple.com.edgesuite.net/'
		];
	
		for (i = 0; i < scriptURLs.length; i++) {
			if (url.indexOf(scriptURLs[i]) === 0) {
			return true;
			}
		}
		
		
		var errorsToIgnore = [
			
			'top.GLOBALS',
			'originalCreateNotification', 
			'canvas.contentDocument',
			'MyApp_RemoveAllHighlights',
			'http://tt.epicplay.com/',
			'Can\'t find variable: ZiteReader',
			'jigsaw is not defined',
			'ComboSearch is not defined',
			'http://loading.retry.widdit.com/',
			'atomicFindClose',
			
			'fb_xd_fragment',
			
			'Script error.'
		];
	
		for (i = 0; i < errorsToIgnore.length; i++) {
			if (error.indexOf(errorsToIgnore[i]) > -1) { 
			return true;
			}
		}
	
		return false;
	}
	
	function displayInConsole(message) {
		if (window.console && window.console.error) {
			message = "An error has occured. This data has been sent to the web server:\n" + message;
			window.console.error(message);
		}
	}
	
	function sendToServer(message) {
		var serverLogUrl = '/jsp/log.jsp?message=' + encodeURIComponent(message);
		if (jQuery) {
			
			jQuery.get(serverLogUrl);
		} else {
			 
			Image().src = serverLogUrl;
		}
	}

	
	// Adapted from http://stackoverflow.com/questions/11386492/accessing-line-number-in-v8-javascript-chrome-node-js
		
	function getLineNumber(index) {
		if (Error.captureStackTrace) {
			var orig = Error.prepareStackTrace;
			Error.prepareStackTrace = function(_, stack) {
				return stack;
			};
			var err = new Error;
			Error.captureStackTrace(err, arguments.callee);
			var stack = err.stack;
			Error.prepareStackTrace = orig;
			try {
				return stack[index].getLineNumber();
			} catch (e) {
				return -1;
			}
		} else {
			return -2;
		}
	}

	
	// Adapted from this gist by Pamela Fox: 
	// https://gist.github.com/pamelafox/1878283/c789b4beb4c70d87f1c4ba4668930b1cc3c14c45 
	function sendError(error, url, lineNum) { 
		var stack, message;
		
		if (error.message) {                     
			lineNum = lineNum || error.lineNumber || getLineNumber(1);
			stack = error.stack;
			error = error.message;
		} else if (error.target && error.type) { 
			error = error.type;
		} else if (!error.indexOf) {             			
			error = 'Error of unknown type: ' + (typeof error);
		}

		url = url || (window.location.href + location.search);
		lineNum = lineNum || 'None';
	
		
		if (shouldIgnore(error, url)) {
			return;
		}
	
		
		message = 'JS Error:\n' + error + '\n' + 'URL:\n' + url + '\n';

		if (lineNum) {
			message += 'Line:\n' + lineNum + '\n';
		}
		message += 'Document URL:\n' + document.URL + '\n';
		message += 'UserAgent:\n' + window.navigator.userAgent + '\n';
		
		if (!stack && window.printStackTrace) {
			try {
				stack = printStackTrace().slice(4).join('\n');
			} catch(e) {}
		} 

		if (stack) {
			message += 'Stacktrace:\n' + stack + '\n';
		}
		
		displayInConsole(message);
		sendToServer(message);
	}

	
	window.UU = window.UU || {};
	
	
	if (!UU.logError) {
		UU.logError = sendError;
	}
})();