// *** This script helps automatically track clicks on file download links, mailto links, and external site links
// *** when using the asynchronous header code for Google Analytics.
// *** See http://www.blastam.com/blog/index.php/2011/04/how-to-track-downloads-in-google-analytics/ for more info.
// *** Note that the script requires jQuery (currently coded to support 1.6)
// *** Note that the list of download file types can be customized if needed, but currently includes:
// *** zip, rar, exe, pdf, doc, docx, xls, xlsx, ppt, pptx, mp3, mp4, mov, avi, wma, wmv

if (typeof jQuery != 'undefined') {
    jQuery(document).ready(function($) {
        var filetypes = /\.(zip|rar|exe|pdf|doc*|xls*|ppt*|mp*|mov|avi|wm*)$/i;
        var baseHref = '';
        if (jQuery('base').attr('href') != undefined)
            baseHref = jQuery('base').attr('href');
        jQuery('a').each(function() {
            var href = jQuery(this).attr('href');
            if (href && (href.match(/^https?\:/i)) && (!href.match(document.domain))) {
                jQuery(this).click(function() {
                    var extLink = href.replace(/^https?\:\/\//i, '');
                    _gaq.push(['_trackEvent', 'External', 'Click', extLink]);
                    if (jQuery(this).attr('target') != undefined && jQuery(this).attr('target').toLowerCase() != '_blank') {
                        setTimeout(function() { location.href = href; }, 200);
                        return false;
                    }
                });
            }
            else if (href && href.match(/^mailto\:/i)) {
                jQuery(this).click(function() {
                    var mailLink = href.replace(/^mailto\:/i, '');
                    _gaq.push(['_trackEvent', 'Email', 'Click', mailLink]);
                });
            }
            else if (href && href.match(filetypes)) {
                jQuery(this).click(function() {
                    var extension = (/[.]/.exec(href)) ? /[^.]+$/.exec(href) : undefined;
                    var filePath = href;
                    _gaq.push(['_trackEvent', 'Download', 'Click-' + extension, filePath]);
                    if (jQuery(this).attr('target') != undefined && jQuery(this).attr('target').toLowerCase() != '_blank') {
                        setTimeout(function() { location.href = baseHref + href; }, 200);
                        return false;
                    }
                });
            }
        });
    });
}