var t;
var doLoop = true;

function scrollDivToTop(content)
{
var div = document.getElementById(content);

if (div.scrollTop>0 && doLoop)
{
div.scrollTop-=3;
t = setTimeout("scrollDivToTop('" + content + "')", 1);
}
else clearTimeout(t);
}

function scrollDivToBottom(content)
{

var div = document.getElementById(content);

if (div.scrollTop<999999999 && doLoop)
{
div.scrollTop+=3;
t = setTimeout("scrollDivToBottom('" + content + "')", 1);
}
else clearTimeout(t);
}

function stop()
{
doLoop = false;
setTimeout('doLoop = true;', 5);
}