function openPopup(url,w,h) { 
	var parString = "width=" + w + ",height=" + h
				+ ",toolbar=0,location=0,directories=0"
				+ ",status=0,menuBar=0,scrollbars=yes,resizable=1,left="+(screen.width-w)/2+",top="+(screen.height-h)/2;
			var winPop = window.open(url,"",parString);
}