function popup(url) {
	window.open(url,'','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes,resizable=0,width=540,height=460'); 
	return false;	
}

function update_parent(win, url) {
	var w = win.opener; 
	w.location=url; 
	win.close;
	return true;
}