var scrollTime;

function scrollingTop() {
	scrollTime = setInterval(scrollUp, 100);
}

function scrollUp() {
	document.getElementById('text').scrollTop += 15;
}

function scrollingBottom() {
	scrollTime = setInterval(scrollDown, 100);
}

function scrollDown() {
	document.getElementById('text').scrollTop -= 15;
}

function clearScroll() {
	clearInterval(scrollTime);

}