//	This javascript tags file downloads and external links in Google Analytics.
//	You need to be using the Google Analytics New Tracking Code (ga.js) 
//	for this script to work.
//	To use, place this file on all pages just above the Google Analytics tracking code.
//	All outbound links and links to non-html files should now be automatically tracked.
//
//	This script has been provided by Goodwebpractices.com
//	Thanks to ShoreTel, MerryMan and Colm McBarron

// http://www.goodwebpractices.com/roi/track-downloads-in-google-analytics-automatically.html

// 5/16/11 Updated for asynchronous GA code.

function addGAToDownloadLinks() {
	if (document.getElementsByTagName) {
		// Initialize external link handlers
		var hrefs = document.getElementsByTagName("a");
		for (var l = 0; l < hrefs.length; l++) {
			// try {} catch{} block added by erikvold VKI
			try{
				//protocol, host, hostname, port, pathname, search, hash
				if (hrefs[l].protocol == "mailto:") {
					startListening(hrefs[l],"click",trackMailto);
				} else if (hrefs[l].protocol == "tel:") {
					startListening(hrefs[l],"click",trackTelto);
				} else if (hrefs[l].hostname == location.host) {
					var path = hrefs[l].pathname + hrefs[l].search;
					var isDoc = path.match(/\.(?:doc|eps|jpg|png|svg|xls|ppt|pdf|xls|zip|txt|vsd|vxd|js|css|rar|exe|wma|mov|avi|wmv|mp3)($|\&|\?)/);
					if (isDoc) {
						startListening(hrefs[l],"click",trackExternalLinks);
					}
				} else if (!hrefs[l].href.match(/^javascript:/)) {
					startListening(hrefs[l],"click",trackExternalLinks);
				}
			}
			catch(e){
				continue;
			}
		}
	}
}

addLoadEvent(addGAToDownloadLinks);

function startListening (obj,evnt,func) {
	if (obj.addEventListener) {
		obj.addEventListener(evnt,func,false);
	} else if (obj.attachEvent) {
		obj.attachEvent("on" + evnt,func);
	}
}

function trackMailto (evnt) {
	var href = (evnt.srcElement) ? evnt.srcElement.href : this.href;
	var mailto = "/mailto/" + href.substring(7);
	_gaq.push(['_trackPageview', mailto]);
}

function trackTelto (evnt) {
	var href = (evnt.srcElement) ? evnt.srcElement.href : this.href;
	var telto = "/telto/" + href.substring(4);
	_gaq.push(['_trackPageview', telto]);
}

function trackExternalLinks (evnt) {
	var e = (evnt.srcElement) ? evnt.srcElement : this;
	while (e.tagName != "A") {
		e = e.parentNode;
	}
	var lnk = (e.pathname.charAt(0) == "/") ? e.pathname : "/" + e.pathname;
	if (e.search && e.pathname.indexOf(e.search) == -1) lnk += e.search;
	if (e.hostname != location.host) lnk = "/external/" + e.hostname + lnk;
	_gaq.push(['_trackPageview', lnk]);
}