function navinit() {

		var container = document.getElementById('top_navi_holder');
		var n_navanchors = container.getElementsByTagName('a');
		
		for(i=0; i<n_navanchors.length;i++) {
			var elm       = n_navanchors[i];
			
				
			if (elm.className.indexOf('inaktiv') > -1) {
				elm.onmouseover = function() { 
					var re = /_n\.gif/;
					var to = '_a.gif';
					var aImgs  = this.getElementsByTagName('img');
					var aImg   = aImgs[0];
					var n_img_src = aImg.src;
					var a_img_src = n_img_src.replace(re,to);
        	aImg.src = a_img_src;
        }
        elm.onmouseout  = function() { 
        	var re = /_a\.gif/;
					var to = '_n.gif';
        	var aImgs  = this.getElementsByTagName('img');
					var aImg   = aImgs[0];
					var a_img_src = aImg.src;
					var n_img_src = a_img_src.replace(re,to);
        	aImg.src = n_img_src;
				}
			}
		}
	}

	function imgpreloader() {
		// bilder auslesen
		var aImg = new Array();
		var i;
		var re = /_n\.gif/;
		var to = '_a.gif';
		
		var container = document.getElementById('top_navi_holder');
		var n_navimgs = container.getElementsByTagName('img');
		for (i=0;i<n_navimgs.length;i++) {
			aImg[i] = n_navimgs[i].src.replace(re,to);			
		}

		// preloader starten
		new ImagePreloader(aImg,donothing);

	}
	
	function donothing() { }