defaultStep=5
step=defaultStep  

function scrollDivDown(id){ 
clearTimeout(timerDown)  
document.getElementById(id).scrollTop+=step  
timerDown=setTimeout("scrollDivDown('"+id+"')",10)
}

function scrollDivUp(id){ 
clearTimeout(timerUp) 
document.getElementById(id).scrollTop-=step  
timerUp=setTimeout("scrollDivUp('"+id+"')",10) 
}

function scrollDivLeft(id){
clearTimeout(timerDown)  
document.getElementById(id).scrollLeft+=step
timerDown=setTimeout("scrollDivLeft('"+id+"')",10)
}

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

timerDown=""  
timerUp=""  

function stopMe(){ 
clearTimeout(timerDown)  
clearTimeout(timerUp) 
}

function alertTest(){
  alert('Testing');
}

document.onmousemove=function(){stopMe()}