step=3;

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); 
}

function scrollDivRight(id){ 
	document.getElementById(id).scrollLeft+=step ;
	timerRight=setTimeout("scrollDivRight('"+id+"')",10); 
}

function scrollDivLeft(id){ 
	document.getElementById(id).scrollLeft-=step;
	timerLeft=setTimeout("scrollDivLeft('"+id+"')",10); 
}