var step=1;
var timerUp, timerDown;
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) 
}