function popWindow(url, width, height)
{
	var left = (screen.width - width) / 2; 	   
	var top = (screen.height - height) / 2; 	 
	var newWin = window.open(url, "", "width=" + width + ",height=" + height + ",left=" + left + ",top=" + top + ",toolbar=no,status=no,titlebar=no,menubar=no,resizable=no");
	newWin.focus();
}