function show_popup(url, w, h, sb) {
	if(!url)return false;
	l = ( screen.width - w )/2;
	t = ( screen.height - h )/2;
	win_name = String("a" + String(Math.round(Math.random() * 1000)));
	if (!sb) {
		bars = 'scrollbars=no';
	}
	else {
		bars = 'scrollbars=yes';
	}
	if (h == 0) {
		window.open(url, win_name, "width=" + w + ",left=" + l + ",toolbar=no,location=no,directories=no,status=no,menubar=no," + bars + ",copyhistory=no,resizable=no");
	}
	else {
		window.open(url, win_name, "width=" + w + ",left=" + l + ",height=" + h + ",toolbar=no,location=no,directories=no,status=no,menubar=no," + bars + ",copyhistory=no,resizable=no");
	}
}

function t_open(url)
{
	if(!url)return false;
	show_popup(url, 516, 586)
}