function showPopup(location, width, height)
	{
	  var left = (screen.width/2) - width/2;
	  var top = (screen.height/2) - height/2-100;
	  var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top;
	  var msgWindow = window.open(location, 'addresource', styleStr);
	  msgWindow.focus();
	}