var scrollStep=1;
var scrollStepFast=10;

var timerLeft="";
var timerRight="";

function scrollDivLeft(id){
  clearTimeout(timerRight);
  document.getElementById(id).scrollLeft+=scrollStep;
  timerRight=setTimeout("scrollDivLeft('"+id+"')",10);
}

function scrollDivRight(id){
  clearTimeout(timerLeft);
  document.getElementById(id).scrollLeft-=scrollStep;
  timerLeft=setTimeout("scrollDivRight('"+id+"')",10);
}

function scrollDivLeftFast(id){
  clearTimeout(timerRight);
  document.getElementById(id).scrollLeft+=scrollStepFast;
  timerRight=setTimeout("scrollDivLeftFast('"+id+"')",10);
}

function scrollDivRightFast(id){
  clearTimeout(timerLeft);
  document.getElementById(id).scrollLeft-=scrollStepFast;
  timerLeft=setTimeout("scrollDivRightFast('"+id+"')",10);
}

function stopMe(){
  clearTimeout(timerRight); 
  clearTimeout(timerLeft);
}