function create_window(url,width,height)
  {
      width = width + 20;
      height = height + 20;

      if(window.popup_window && !window.popup_window.closed)
      {
          window.popup_window.resizeTo(width,height);
      }

      var popup_window = window.open(
		url,
		'UserAccounts', 'width='+width+',height='+height+',status=no,resizable=no,top=200,left=200,dependent=yes,alwaysRaised=yes');
      popup_window.opener = window;
      popup_window.focus();
  }