using horizontal .scrollTo in jQuery without causing jumps in page

I'm trying to implement a tab slider using the .scrollTo plug-in for jQuery. Here's a demo of the project right now: http://www.joshualoves.com/temp/lura/

The problem is that when an anchor is clicked on, the page "jumps" down to the location of that anchor. It also switches to correct div, but without actually scrolling.

I've implememnted scrollTo before, so I'm not sure what the problem is - here is the code.

$(document).ready(function() {
$('div.slideThumbnail').click(function () {
    $('#slideshowMask').scrollTo(("#" + $target), 800);                                 
    return false;
});
});

$target is set when the user clicks on the link in the thumbnail开发者_如何转开发 that corresponds to the slide.

I think that the problem might be that in the firebug console i have

 "NetworkError: 404 Not Found - http://www.joshualoves.com/temp/lura/jquery.scrollTo.js"

So it seems you are not loading the plugin