var subnavActiv = null;

function navShowSub(){
//	if(subnavActiv)
//		subnavActiv.style.visibility = 'hidden';
	if(this.getElementsByTagName('ul').length>0)
		this.getElementsByTagName('ul')[0].style.visibility = 'visible';
}

function navHideSub(){
	if(this.getElementsByTagName('ul').length>0)
		this.getElementsByTagName('ul')[0].style.visibility = 'hidden';
//	if(subnavActiv)
//		subnavActiv.style.visibility = 'visible';
}
function navInit(){
	if(document.getElementById('nav')){ // in frames there may not be one..
		if(document.getElementById('activNav') && document.getElementById('activNav').getElementsByTagName('ul').length>0)
			subnavActiv = document.getElementById('activNav').getElementsByTagName('ul')[0];
	
		var li = document.getElementById('nav').firstChild;
		while(li){
			li.onmouseover = navShowSub;
			li.onmouseout  = navHideSub;
			li = li.nextSibling;
		}
	}
}

window.onload = navInit;