window.onload = function(){

   var myfunctions = {
      'a.newWindow' : function(element){
         element.onclick = function(){
            window.open(element.href, 'newWindow', 'height=388,width=536,resizable=yes,scrollbars=yes');
            return false;
         }
      }
   }

   Behaviour.register(myfunctions);
}