Track file clicks with jQuery and Google Analytics (gs.js)

file-click-track.js

//File Click Tracker (jpillora@think.edu.au)
$(document).ready(function() {
    //show event instead of sending to GA (modifiable)
    var debug = false;
    //snippet variables (non-modifiable)
    var loc = window.location;
    //watch all form submissions with a 'data-track' attribute
    $(document).on("click", "a", function(e) {

        var a = $(this);
        var category = null;
        var action = "Click";
        var href = a.attr("href");
        
        if(/^mailto\:/i.test(href)) {
          category = "Mail";
        } else if(/\.(pdf|docx?|xlsx?|pptx?)$/i.test(href)) {
          action += "-" + RegExp.$1;
          //prefix absolute urls
          if(/^\//.test(href)) href = loc.protocol + loc.hostname + href;
          category = "Download";
          
        } else if(/^https?\:\/\//i.test(href)) {
          category = "External";
        } else {
          return; //do nothing
        } 
        
        var track = ["_trackEvent", category, action, href];
        if(debug)
          alert(track.join(', '));
        else if(window._gaq)
          _gaq.push(track);

        //new tab, so open link now
        if(a.attr('target') && a.attr('target').toLowerCase() === '_blank')
          return true;

        //in half a second - resubmit
        setTimeout(function() {
          loc.href = href;
        }, 500);

        //prevent the form from submitting
        e.preventDefault();
        return false;
    });
});