function upScroll() {
    	window.scrollBy(0,-3); // horizontal and vertical scroll increments
    	    	scrolldelay = setTimeout('upScroll()',2); // scrolls every 100 milliseconds
}


function downScroll() {
    	window.scrollBy(0,3); // horizontal and vertical scroll increments
    	    	scrolldelay = setTimeout('downScroll()',2); // scrolls every 100 milliseconds
}


function stopScroll() {
    	clearTimeout(scrolldelay);
}