Global Google Analytics Event Tracking script

tracking.js

document.observe("dom:loaded",function(){
    initEventTrackingLinks();
});

var initEventTrackingLinks = function(){
    $$(".event-tracking").each(function(elm){
        elm.observe("click", function(evt){
            var category = elm.readAttribute("data-event-category");
            var action = elm.readAttribute("data-event-action");
            var label = elm.readAttribute("data-event-label");
            var value = elm.readAttribute("data-event-value");
            if(!elm.hasClassName("ajax-tracking")){
                evt.preventDefault();
                setTimeout(function(){
                    document.location = elm.href;
                }, 100);
            }
            _gaq.push(['_trackEvent', category, action, label, value]);
        });
    });
};