function openPopUp(file,w,h) {
	mywidth = w;
	myheight = h;
	myleft = (screen.width - mywidth) / 2;
	mytop = (screen.height - myheight) / 2;
	window.open(file, "popUp", "width=" + mywidth + ",height=" + myheight + ",left=" + myleft + ",top=" + mytop + ",scrollbars=1,resizable=0,menubar=0,toolbar=0,status=0,location=0,directories=0");
}