scrollStep=1

timerUp=""
timerDown=""

function toTop(id){
document.getElementById(id).scrollTop=0
}

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

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

function toBottom(id){
document.getElementById(id).scrollTop=document.getElementById(id).scrollHeight
}

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