//    Javascript to tag file downloads and external links in Google Analytics
//    To use, place reference to this file should be placed at the bottom of all pages, 
//    just above the Google Analytics tracking code.
//    All outbound links and links to non-html files should now be automatically tracked.
//
//  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//    Created by:     Colm McBarron, colm.mcbarron@iqcontent.com
//    Last updated:     12-Feb-2006
//    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
var hrefs = document.getElementsByTagName("a");
var link_path = "";
for (var l = 0; l < hrefs.length; l++) {
        try {
            var link_path = hrefs[l].pathname;
            if (location.host == hrefs[l].hostname) {
                if (link_path.match(/\.(doc|pdf|xls|ppt|zip|txt|vsd|vxd|js|css|rar|exe|wma|mov|avi|wmv|mp3)$/)) {
                    addtrackerlistener(hrefs[l]);
                }
            } else {
                addtrackerlistener(hrefs[l]);
            }
        }
        catch(err) { }
}

function addtrackerlistener(obj) {
    if (obj.addEventListener) {
        obj.addEventListener('click', trackfiles, true);
    } else if (obj.attachEvent) {
        obj.attachEvent("on" + 'click', trackfiles);
    }
}
function trackfiles(array_element) {
    file_path = "";
    if (location.host != this.hostname) {
        file_path = "http://webarchive.nationalarchives.gov.uk/20081023141438/http://www.foe.co.uk/exlinks/"  + ((array_element.srcElement) ? "/" + array_element.srcElement.hostname : this.hostname);
    }
    file_path = file_path + ((array_element.srcElement) ? "/" + array_element.srcElement.pathname : this.pathname);
    urchinTracker(file_path);
}