function popUp(URL,w,h) {
		day = new Date();
		id = day.getTime();
		var left = (screen.width-w)/2;
		var top = (screen.height-h)/2;
		eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=" + w + ",height=" + h + ",left =" + left + ",top = " + top + "');");
	}