var akt,menu;

function initnavi() {
	for (i=1; i<6; i++) {
		if (document.getElementsByTagName('a')[i].className == "aktiv") {
			akt = document.getElementsByTagName('a')[i].innerHTML.toLowerCase();
			resetnavi();
		}
	}
}

function hovermouse(menu) {
	outnavi();
	if (document.getElementById(menu)) document.getElementById(menu).style.visibility = "visible";
}

function resetnavi() {
	outnavi();
	if (akt) document.getElementById(akt).style.visibility = "visible";
}

function outnavi() {
	for (i=0; i<document.getElementById('subnavi').getElementsByTagName('div').length; i++) {
		document.getElementById('subnavi').getElementsByTagName('div')[i].style.visibility = "hidden";
	}
}