gistfile1.js

jQuery(document).ready(function($){
    $('form').submit(function(event){
        //if analytics object exists
        if(window._gat){
            event.preventDefault();
            optinForm = this;
            _gaq.push(['_set','hitCallback', function(){
                                                optinForm.submit();
                                             }]);
            _gaq.push(['_trackEvent', 'Forms', 'Submit', 'hbsanewtraffic']);
        }
        //if no analytics object, service as normal
    });
});

Great resource. will test it for my forms