function popup(mylink, windowname, width, height) {
	if (!window.focus) return true;
	
	var href;
	if (typeof(mylink) == 'string') 
		href = mylink;
	else
		href = mylink.href;
	
	window.open(href, windowname, 'width=' + width + ',height=' + height + ',scrollbars=no');
	return false;
}