var doScroll = false;
var scrollId;
function clearScroll()
{
doScroll = false;
if (scrollId != null)
window.clearInterval(scrollId);

}
function startScrollUp()
{
doScroll = true;
if (scrollId != null)
	window.clearInterval(scrollId);
scrollId = window.setInterval('scrollUp();',50);
}
function startScrollDown()
{
doScroll = true;
if (scrollId != null)
	window.clearInterval(scrollId);
scrollId = window.setInterval('scrollDown()',50);
}
function scrollDown()
{

if (doScroll)
{
var s = $('scroll1');
var nI = s.scrollTop + 5;
if (nI > s.scrollHeight - s.offsetHeight)
	nI=s.scrollHeight - s.offsetHeight;
s.scrollTop = nI;

}
else
{
clearInterval(scrollId);
}
}

function scrollUp()
{
if (doScroll)
{
var s = $('scroll1');
var nI = s.scrollTop - 5;
if (nI <= 0)
	nI=0
s.scrollTop = nI;
}
else
{
clearInterval(scrollId);
}
}