function handleScroll(){
	
	if($('publicationlist')){
		$('publications').setStyle({overflow:'hidden'}); 
		if($('publicationlist').offsetHeight > 330){
				$('scrollupdown').setStyle({visibility:'visible'}); 
				
		}
	}
	
	}
	
	function changePfeil(id, state){
		var img	=new Image;
		if(state=='hover'){
			img.src='img/scroll'+id+'_hover.gif';
		
		}else{
			img.src='img/scroll'+id+'.gif';
		}
	
		document.getElementById(id).src=img.src;
	}
	
	
	function showlink(){
	
		$('pdf').setStyle({visibility:'visible'}); 
	
	
	}
	
	
	function hidelink(){
	
		$('pdf').setStyle({visibility:'hidden'}); 
	
	
	}