function startScroll(spd) {
	var rollBox = document.getElementById('rollBox');
	rollBox.style.top='25px';
	verScroll(spd);
}
function verScroll(spd) {
	speed = spd;
	scrolltimer = null;
	var rollBox = document.getElementById('rollBox');
	if (rollBox.offsetHeight<(-parseInt(rollBox.style.top))) { rollBox.style.top = '25px'; }
	speed = parseInt(spd);
	rollBox.style.top = parseInt(rollBox.style.top)-speed+'px';
	scrolltimer = setTimeout("verScroll(speed)", 100);
}