Attaching And Reattaching Event Handlers

//html
<a href="?default=1" class="default">Set Default</a>
//js
document.observe('dom:loaded', function(){
   //get all elements with d 'default' classname
   for(i = 0;i < document.getElementsByClassName('default').length;i++)
   {
      s = document.getElementsByClassName('default')[i];
      //attach an onclick event
      s.observe('click', function(e){
         //prevent the default action (i.e following the link)
         e.preventDefault();
         //read d link attribute
         ref = this.readAttribute('href');
         //and now, do it the ajax way
         new Ajax.Request('js/ajax/handler.php'+ref, {
            method:'get',
            onSuccess:function(transport){}
         });
      });
   }
});