var timer = 0;
var delay = 5;
var scrollOffset = 15;

function scrollToBottom() {
	var docBody = document[(document.compatMode && document.compatMode == "CSS1Compat") ? "documentElement" : "body"];
	var y = docBody.scrollTop;
	if (y < (docBody.scrollHeight - docBody.clientHeight)) {
		window.scrollBy(0, scrollOffset);
		timer = setTimeout('scrollToBottom()', delay);
	} else {
		clearTimeout(timer);
	}
	return false;
}