function highlightCurrentPageLink() {
    var anzHrefs = document.getElementsByTagName("li").length;
    for (var i = 0; i <= anzHrefs - 1; i++) {
    	if (document.getElementsByTagName("li")[i].firstChild.href == document.location.href) {
        	var currentClassName = document.getElementsByTagName("li")[i].className;
        	var newClassName = currentClassName.replace(/inaktiv/,"aktiv");
        	document.getElementsByTagName("li")[i].className = newClassName;
      	} 
    }
}