step=3

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)
}  

timerDown=""
timerUp=""

function stopMe(){ 
	clearTimeout(timerDown)  
	clearTimeout(timerUp) 
}
document.onmousemove=function(){stopMe()}