function showWnd(url, width, height)
{
	wnd = window.open(url, null, "height=" + height + ", width=" + width + ", top=" + (window.screen.availHeight / 2 - height / 2) + ", left=" + (window.screen.availWidth / 2 - width / 2) + ", status=yes, toolbar=no, resizable=no; menubar=no, location=no", true);
	if(wnd)
	{
		wnd.focus();
		wnd.moveTo(window.screen.availWidth / 2 - width / 2, window.screen.availHeight / 2  - height);
		wnd.resizeTo(width, height);
		if(!wnd.opener)
			wnd.opener = self;
	}
	return wnd;
}