/**
 * Javascript to track file downloads and external links in Google Analytics
 *
 * Written by Carwin Zimmermann for Radley Yeldar on 2 May 2008. Based on 
 * similar functionality written by Colm McBarron, colm.mcbarron@iqcontent.com
 */

var hrefs = document.getElementsByTagName("a");
for (var hrefIndex = 0; hrefIndex < hrefs.length; hrefIndex++) {
	try {
		if (location.host == hrefs[hrefIndex].hostname) {
			if (hrefs[hrefIndex].pathname.match(/\.(doc|pdf|xls|ppt|zip|txt|vsd|vxd|js|css|rar|exe|wma|mov|avi|wmv|mp3|flv)$/)) {
				addTrackerListener(hrefs[hrefIndex]);
			}
		} else {
			addTrackerListener(hrefs[hrefIndex]);
		}
	}
	catch(err) { }
}

function addTrackerListener(obj) {
	if (obj.addEventListener) { // W3C event registration model
		obj.addEventListener('click', trackFiles, true);
	} else if (obj.attachEvent) { // Microsoft's event registration model
		obj.attachEvent('onclick', trackFiles);
	}
}

function trackFiles(event) {
	path = '';
	if (location.host != (event.srcElement ? event.srcElement.hostname : this.hostname)) {
		path = path + '/exlinks/' + ((event.srcElement) ? '/' + event.srcElement.hostname : this.hostname);
	}
	path = path + ((event.srcElement) ? '/' + event.srcElement.pathname : this.pathname);
	pageTracker._trackPageview(path);
}