function OpenWin(a, w, h) {
	if (!a) return true;
	w = parseInt(w);
	h = parseInt(h);
	if (!h || !w) return true;
	var sx = (screen.availWidth - w) / 2;
	var sy = (screen.availHeight - h) / 2;
	var win = self.open(a.href, a.target, 'width=' + String(w) + ',height=' + String(h) + ',left=' + String(sx) + ',top=' + String(sy) + ',toolbar=no,scrollbars=yes');
	return false;
}