Scroll function not working properly, using JQuery?
<p>I have this code &amp; when I click <code>#down</code> the page scrolls down by 20, which is correct. When I click <code>#up</code> the page scrolls right to the top which is wrong as I want the page scroll up by 20 only. Here's the code I'm working with:</p>

<pre><code>$('#up').click(function(){
    $('html, body').animate({
        scrollTop: $(this).offset().top -= 20
    });
    return false;
});

$('#down').click(function(){
    $('html, body').animate({
        scrollTop: $(this).offset().top += 20
    });
    return false;
}); 
</code></pre>

<p>Any input would be greatly appreciated, Thanks</p>
