function menuin(tt){


	if (document.getElementById("img"+tt)){
		document.getElementById("img"+tt).src="img/"+tt+"_over.png";
		document.getElementById("div"+tt).style.background="";
	}
	document.getElementById("sub"+tt+"").style.visibility="visible";
}


function menuout(tt,changeBackground){

	if (document.getElementById("img"+tt)){
	
	if(changeBackground!="no"){
		document.getElementById("img"+tt).src="img/"+tt+".png";
		document.getElementById("div"+tt).style.background="";
	}
    if(changeBackground!="yes"){
		document.getElementById("img"+tt).src="img/"+tt+"_active.png";
		document.getElementById("div"+tt).style.background="";
	}
	}
	document.getElementById("sub"+tt+"").style.visibility="hidden";
}

function tippin(tt){

	if (document.getElementById(tt)){
		document.getElementById(tt).style.background='';
		if (document.getElementById(tt+"pfeil")){
			document.getElementById(tt+"pfeil").style.visibility="visible";
			document.getElementById("hauptpfeil").style.visibility="hidden";
		}
	}
}
function tippout(tt,ttparent){

	if (document.getElementById(tt)){
		if(ttparent=="footer"){
			farbe="";
		}else{
			farbe="";
		}
		document.getElementById(tt).style.background=farbe;
		if (document.getElementById(tt+"pfeil")){
			document.getElementById(tt+"pfeil").style.visibility="hidden";
			if (ttparent!="MOST4_R30" && ttparent!="MOST4_R32" && ttparent!="MOST4_R34" && ttparent!="MOST4_R36" && ttparent!="MOST4_R38"){
				document.getElementById("hauptpfeil").style.visibility="visible";
			}
		}
	}
}