function getElementsByClassName(class_name){
    var all_obj;
		var ret_obj=new Array();
		var j=0;
    var i;		  
    if(document.getElementsByTagName){
		  all_obj=document.getElementsByTagName("*");
      for(i=0;i<all_obj.length;i++){
        if(all_obj[i].className==class_name){
          ret_obj[j]=all_obj[i];
          j++;
        }
      }
		}
    return ret_obj; //!!!! Array
  }
	
	
	function nachObenGehen(){
	  window.scrollTo(0,0);
	}
	
	function machSchwarz(elem){
	  elem.style.color="#133d0c";
	}
	
	function machGrau(elem){
	  elem.style.color="#287a21";
	}
	
	//Achtung: globale Variable um ein Taskleistenfenster ggf. zu schließen
	var pu="";
	function machPopUp(lk){
	  if(pu)pu.close();	 
	  pu = window.open(lk,"Bild","width=800, height=650px, scrollbars=yes,top=0,left=0,");
		pu.moveTo(0,0);							
	}
		
	function init(){
	  var alleNachOben = getElementsByClassName("nachOben");		
		for(var j=0;j<alleNachOben.length;j++){
		  alleNachOben[j].onclick = function(){nachObenGehen();};
			//alleNachOben[j].onmouseover = function(){machSchwarz(this);};	
			//alleNachOben[j].onmouseout = function(){machGrau(this);};							
		}			
	}