function wopen(url, w, h)
{
        // Fudge factors for window decoration space.
	// In my tests these work well on all platforms & browsers.
        w += 32;
        h += 96;
	var win = window.open(url,
		'popup', 
		'width=' + w + ', height=' + h + ', ' +
		'location=no, menubar=no, ' +
		'status=no, toolbar=no, scrollbars=no, resizable=no');
	win.resizeTo(w, h);
	win.focus();
}