sfHover = function() {
	var sfEls = document.getElementById("top_nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

loadTopNav = function() {
	image1 = new Image();
	image1.src = "tn_kongresse_hov.gif";
	image2 = new Image();
	image2.src = "tn_workshops_hov.gif";
	image3 = new Image();
	image3.src = "tn_businessclub_hov.gif";
	image4 = new Image();
	image4.src = "tn_trainerclub_hov.gif";
	image5 = new Image();
	image5.src = "tn_partner_hov.gif";
	image6 = new Image();
	image6.src = "tn_ueberuns_hov.gif";
	
	image7 = new Image();
	image7.src = "tn_kongresse_act.gif";
	image8 = new Image();
	image8.src = "tn_workshops_act.gif";
	image9 = new Image();
	image9.src = "tn_businessclub_act.gif";
	image10 = new Image();
	image10.src = "tn_trainerclub_act.gif";
	image11 = new Image();
	image11.src = "tn_partner_act.gif";
	image12 = new Image();
	image12.src = "tn_ueberuns_act.gif";
}
if (window.attachEvent) window.attachEvent("onload", loadTopNav);