function highlightCurrentPageLink() 
{
	var anzHrefs = document.getElementsByTagName("a").length;
			
	for (var i = 0; i <= anzHrefs - 1; i++) 
	{		
		// Link auf aktuelle Seite gefunden, also umsetzen CSS auf aktiv
		if (document.getElementsByTagName("a")[i].href == document.location.href) 
		{
			document.getElementsByTagName("a")[i].className = "aktiv";
		}
	}
}
		
function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
    	window.onload = func;
	} else {
		window.onload = function(){
		oldonload();
		func();
		}
	}

}

addLoadEvent(highlightCurrentPageLink);