defaultStep=5 
step=defaultStep 

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

} 

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

timerDown="" 
timerUp="" 

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