var timer = null;

function ScrollStart( dir , div ) {

	stopScroller();

	timer = window.setInterval( function() { scrollIt( dir , div ) }, 10);

	document.onmouseup=stopScroller;

}

function scrollIt( dir , div ) {

	var obj = document.getElementById(div);

	switch( dir )

	{

		case 'left': obj.scrollLeft-=3; break;

		case 'up': obj.scrollTop-=3; break;

		case 'down': obj.scrollTop+=3; break;

		default: obj.scrollLeft+=3; break;

	}

}

function stopScroller() {

	window.clearInterval( timer );

}