.neT: Scrolling DIV

<html>
        <script type="text/javascript">
        var scrolling = null;

        function scroll_up() {
            var d = document.getElementById('scroller');

            d.scrollTop = d.scrollTop - 5;

            scrolling = window.setTimeout(function() {
                scroll_up();
            }, 100);
        }

        function scroll_down() {
            var d = document.getElementById('scroller');

            d.scrollTop = d.scrollTop + 5;

            scrolling = window.setTimeout(function() {
                scroll_down();
            }, 100);
        }

        function stop_scroll() {
            window.clearTimeout(scrolling);
        }
        </script>
        <body>
            <div style="color:red;" onmouseover="scroll_up();"

onmouseout="stop_scroll();"> scroll up </div>
            <div id="scroller" style="width:100px; height:70px;

overflow:hidden;">
                Hi,

                I am using a menu inside a div tag.
                What i want to do is to add scroll buttons
                (up and down ) along side div which move
                the div up and down on mouse over.
                How can i achieve this?

                It would be very nice of you if you can
                provide a link to the article or blog
                where solution is provided to my problem.

                Thanks in advance,
                Saad Alam
            </div>
            <div style="color:blue;" onmouseover="scroll_down();"

onmouseout="stop_scroll();"> scroll down </div>
        </body>
    </html>