function onover(tid, mid)
{
	if((document.menu.aktuell.value != "") && (mid != document.menu.aktuell.value))
	{
		document.getElementById(document.menu.aktuell.value).style.visibility="hidden";
	}
	
	document.menu.steuerung.value="over";
	document.menu.aktuell.value=mid;
	
	document.getElementById(tid).style.backgroundColor="#339966";
	document.getElementById(tid).style.color="#FBF9F0";

	document.getElementById(mid).style.visibility="visible";
}