var GATRACK = {

	track: function(gaid, domainEsc) {

		// Google Analytics code adapted from http://www.carronmedia.com/publicfiles/extendga.js
		var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
		
		//use jQuery to call the Google Analytics JavaScript
		$.getScript(gaJsHost + "google-analytics.com/ga.js", function(){
		
			//tell Analytics about the current page load using standard _trackPageview method
			try {
				var pageTracker = _gat._getTracker(gaid);
				pageTracker._trackPageview();
			} catch(err) {}
			
			//loop though each anchor element
			$('a').each(function(){
				
				var href = $(this).attr('href');
				var filetypes = /\.(zip|exe|pdf|doc*|xls*|ppt*|mp3)$/i;
				
				//check for links starting with http or https, making sure that links to our own domain are excluded
				if ((href.match(/^https?\:/i)) && (!href.match(document.domain))){
					$(this).click(function() {
						var extLink = href.replace(/^https?\:\/\//i, '');
						pageTracker._trackEvent('External', 'Click', extLink);
					});
				}
				//check for links starting with mailto:
				else if (href.match(/^mailto\:/i)){
					$(this).click(function() {
						var mailLink = href.replace(/^mailto\:/i, '');
						pageTracker._trackEvent('Email', 'Click', mailLink);
					});
				}
				//check for links with file extension that match the filetypes regular expression:
				else if (href.match(filetypes)){
					$(this).click(function() {
						var extension = (/[.]/.exec(href)) ? /[^.]+$/.exec(href) : undefined;
						var re = new RegExp("^https?\\:\\/\\/(www.)" + domainEsc + "\\/", "i");
						var filePath = href.replace(re, '');
						pageTracker._trackEvent('Download', 'Click - ' + extension, filePath);
					});
				}

			});
			
		});
	}
}