how to add an onclick event to a Twitter button?

Question

I would like to do an Ajax request for my Twitter button(https://dev.twitter.com/docs/tweet-button) before going to Twitter. So before I redirect to the Twitterlogin popup I would like to do something like this(js):

  window.addEvent('domready', function () {
           $('twitterbut').setProperties({
                 onclick: "//do ajax call;return (true);"
             });
         });

I tried this but it does not work:( How can I add an onclick event similar to above working?

Answer 1

Just read Element.Event documentation and use the correct method, ie addEvent :

window.addEvent('domready', function () {
     $('twitterbut').addEvent('click', function() {
           //do ajax call
     });
});