Display updateprogress in the clicked position

On the following example, progress bar(UpdateProgress1) is displayed on the position of the button which got clicked


function pageLoad()

     {     

           var manager = Sys.WebForms.PageRequestManager.getInstance();
   
          
       manager.add_beginRequest(OnBeginRequest);
   
    }

    function OnBeginRequest(sender, args)
    {
 
          var postBackElement = args.get_postBackElement();
          var position = $("#"+postBackElement.id).offset();
         
         
          $("#<%=UpdateProgress1.ClientID%>").css({'position' : 'absolute', 'z-index' : '1002', 'overflow' : 'auto','top' : position.top,'left' : position.left}).fadeIn(100);

}