function scroll(speed)
{
	//alert("up");

	if (speed != 0)
	{
		timerId = setInterval("doScroll("+speed+")", 10);
	}
	else
	{
		clearInterval(timerId);
	}

}

function doScroll(speed)
{
	document.getElementById("content").scrollTop = document.getElementById("content").scrollTop + speed;
}