var position = 90;
var move = -2;

function scroll()
{
	position += move;
	if (position <= -600)
    {
        position = 580;
	}
    else if (position > 580)
    {
	    position = -598;
	}
	document.getElementById('banner').style.left = position+"px";
}

function left() { move = 6;}
function right() { move = -6;}
function defmove() { move = -2;}
function stop() { move = 0;}
function start() { setInterval("scroll();", 40)};