var t;
var doLoop = true;
function scrollDivToTop(){

var div = document.getElementById('text');
if (div.scrollTop>0  && doLoop){
div.scrollTop-=1; //scroll 1 pixel up
t = setTimeout('scrollDivToTop()', 1);
}
else clearTimeout(t);
}

function scrollDivToBottom(){

var div = document.getElementById('text');
if (div.scrollTop<10000000000 && doLoop){
div.scrollTop+=1; //scroll 1 pixel up
t = setTimeout('scrollDivToBottom()', 1);
}
else clearTimeout(t);
}

function stop()
{
	doLoop = false;
	setTimeout('doLoop = true;', 10);
}