<html>
<head>
<script>
<!--
function winopen(url, name, w, h)
{
w += 32;
h += 96;
wleft = (screen.width - w) / 2;
wtop = (screen.height - h) / 2;
if (wleft < 0) {
w = screen.width;
wleft = 0;
}
if (wtop < 0) {
h = screen.height;
wtop = 0;
}
var win = window.open(url,name,'width=' + w + ', height=' + h + ', ' +'left=' + wleft + ', top=' + wtop + ', ' +'location=no, menubar=no, ' +'status=no, toolbar=no, scrollbars=no, resizable=no');
win.resizeTo(w, h);
win.moveTo(wleft, wtop);
win.focus();
}
// -->
</script>
</head>
<body>
<a href="http://url.html" target="popup" onclick="winopen('http://s.url.html', 'popup', 500, 500); return false;">Open the page</a>
</body>
</html>