function openpop(url, width, height)		//popup2 
{
	var maxWidth = screen.width - (screen.width - screen.availWidth) * 2;
	var maxHeight = screen.height - (screen.height - screen.availHeight) * 2;

	if (width > maxWidth) {
		width = maxWidth;
	}
	if (height > maxHeight) {
		height = maxHeight;
	}

	var left = (screen.width - width) / 2;
	var top = (screen.height - height) / 2;

	window.open(url,"_blank","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,copyhistory=0,left=" + left + ",top=" + top + ",height=" + height + ",width=" + width);
}