var scrollAmount = 10;
var vscroll = 0;
var scroll_interval;
function startScroll( dir ) {
	vscroll = scrollAmount * dir;
//	alert(window.scrolledframe.scrollBy);
	scroll_interval = setInterval(doScroll, 100);
	doScroll();
}
function stopScroll() {
	clearInterval(scroll_interval);
}
function doScroll() {
	window.scrolledframe.scrollBy(0,vscroll);
//	alert("scrolling");
}