startMenu = function() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById('nav');
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName=='LI') {
				node.onmouseover=function() {
					this.className+=" over";
  				}
			  node.onmouseout=function() {
				this.className=this.className.replace(" over", "");
				}
			}
		}
		
	}
	
	if(document.getElementById){
		/* Opacity style toekennen */
		navRoot = document.getElementById('nav');
		navNodes = navRoot.getElementsByTagName('li');
		if(navNodes.length>0){
			for(var i=0; i<navNodes.length; i++){
				navSub = navNodes[i].getElementsByTagName('ul');
				if(navSub.length>0){
					for(var j=0; j<navSub.length; j++){
						navSub[j].style.MozOpacity = 0.9;
					}
				}
			}
		}
	
	}
}

addEvent(window,'load',startMenu);