function popUpBanner(url,name,w,h) {
	sw = screen.width;
	sh = screen.height;
	l = (sw - w) /2;
	t = (sh - h) /2;
	obj=window.open(url, name, "left=" + l + ",top=" + t +",width=" + w + ",height=" +h + "toolbar=no,directories=no,status=no,scrollbars=no,resize=no,menubar=no");
	obj.focus();
}