var last
last=""

    	function show(objName) {
    		if (document.getElementById(objName).style.display == "none") {
    			if (last != "") {
    			document.getElementById(last).style.display = "none"
    			}
    			document.getElementById(objName).style.display = "block"
    			last = objName
    		}
    		else {
    		document.getElementById(objName).style.display = "none"
    		last = ""
    		}
    	}
 
 
// Klasse auf aktiven Link setzen
function activeLink() {
    for (i=0; i<document.getElementsByTagName("a").length; i++) {
        if (document.getElementsByTagName("a")[i] == document.location.href ){
            document.getElementsByTagName("a")[i].className = "active";
            }
        }
    }

sfHover = function() {
	var sfEls = document.getElementById("headernavi").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);