var px = 5; //mehr=schneller 
 var timer; 

 function scrollDenDiv(val)
 { 
    clearTimeout(timer); 
    d=document.getElementById('news_container') 
    y=d.scrollTop; 
    if(val==1)y-=px; 
    if(val==2)y+=px; 
    if(y<=d.scrollHeight-d.offsetHeight+px&&y>=0-px)
    { 
       d.scrollTop=y; 
       timer=setTimeout('scrollDenDiv('+val+')',50); 
    } 

    if(y<0||y>d.scrollHeight-d.offsetHeight)
    { 
       clearTimeout(timer); 
    } 
 }