var initialX=500;
  var initialY=0;
  var step=0;
  var periyot=780;  

  function getTo(katman,x,y) {
    if (document.all) { 
      document.all[katman].style.pixelLeft = x;
      document.all[katman].style.pixelTop = y;}
    else 
      if (document.layers) {
        document.layers.konteyner.document.layers[katman].moveTo(x,y);
      } else {
        document.getElementById(katman).style.left = x +"px";document.getElementById(katman).style.top = y +"px";
      }
    } 

  function slip(velo){
    initialX=initialX+step; 
    getTo('news',initialX,initialY)
  } 

  function startTape(velo){
    step=velo;  
    saat = setTimeout("startTape(step)", 20);
    slip(); 
    if(initialX<-periyot){backToInitial();}}  

  function backToInitial() {initialX=500;getTo('news',780,0);}
  function stopIt(){clearTimeout(saat);}