function popup(W,H,url)
{
	if(screen.width <= W || screen.height <= H)
	{
		location.href = alt;
	}else{
		splashWin = window.open(url,"","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width="+W+",height="+H);
		splashWin.moveTo((screen.availWidth-W)*0.5,(screen.availHeight-H)*0.5);
		splashWin.focus();
	}
}