function popup(url, name, width, height)
{
if (screen) {
	LeftPos = (screen.width - width) / 2
	TopPos = (screen.height - height) / 2
}

settings="top="+TopPos+",left="+LeftPos+",fullscreen=no,location=no,directories=no,"+
"status=no,menubar=no,scrollbars=no,"+
"resizable=no,width="+width+",height="+height;

MyNewWindow=window.open(url,name,settings);
}