if(document.getElementById('navi')){

	var lis = document.getElementById('navi').getElementsByTagName('ul')[0].childNodes;
	var length = lis.length;

	for( i=0;i < length; i++){
		if(lis[i].nodeType==1){ //keine Textnodes bitte
			lis[i].onclick = function(){
				//"open"-Klasse ueberall entfernen
				var opens = getElementsByClassName('open','li',document.getElementById('navi'));
				var length = opens.length;

				for( i=0;i < length; i++){
					var rep = opens[i].className.match(' '+'open') ? ' '+'open' : 'open';
					opens[i].className = opens[i].className.replace(rep,'');
				}

				//...und hier hinzufuegen
				this.className += this.className?' open':'open';
			}
			
			//spans zum layouten hinzufuegen
			var span1 = document.createElement("span");
			span1.className="l1";
			
			var span2 = document.createElement("span");
			span2.className="l2";
			
			var span3 = document.createElement("span");
			span3.className="l3";
			
			var span4 = document.createElement("span");
			span4.className="l4";
			
			lis[i].appendChild(span1).parentNode.appendChild(span2).parentNode.appendChild(span3).parentNode.appendChild(span4);
		}
	}

	//spans zum layouten hinzufuegen
	var span1 = document.createElement("span");
	span1.className="l1";
	
	var span2 = document.createElement("span");
	span2.className="l2";
	
	var span3 = document.createElement("span");
	span3.className="l3";
	
	var span4 = document.createElement("span");
	span4.className="l4";

	var p = document.getElementById('navi').getElementsByTagName('p')[0];
	p.appendChild(span1).parentNode.appendChild(span2).parentNode.appendChild(span3).parentNode.appendChild(span4);
}
/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};