function changeMenuButton(e){
	var sourceelement;
	if (e.srcElement) sourceelement = e.srcElement;
	else sourceelement = e.target;
	//alert (sourceelement.src);
	//var elementimage = sourceelement.src;
	if (sourceelement.src.search("_akt.gif") > -1) sourceelement.src = sourceelement.src.replace(/_akt.gif/,".gif");
	else sourceelement.src = sourceelement.src.replace(/.gif/,"_akt.gif");
}