defaultStep=5
step=defaultStep

function setDivTimer(id){
timerDown=0
timerUp=0
}

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

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

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