[jQuery] Can I use more than one JQuery code on a page at a time?

[SPWebcreations]

I am using the lavalamp navigation and the coda slider on the same
page but only one will work at a give time... Can anyone help?
Here is the header file I am using...
<script type="text/javascript" src="/assets/scripts/
jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="/assets/scripts/
jquery.easing.min.js"></script>
<script type="text/javascript" src="/assets/scripts/
jquery.lavalamp.min.js"></script>
<script type="text/javascript">
        $(function() {
            $("#a").lavaLamp({
                fx: "backout",
                speed: 700,
                click: function(event, menuItem) {
                    return false;
                }
            });
        });
    </script>
<script type="text/javascript" src="/assets/scripts/jquery.js"></
script>
<script type="text/javascript" src="/assets/scripts/
jquery.scrollTo-1.4.1-min.js"></script>
<script type="text/javascript" src="/assets/scripts/
jquery.localscroll-1.2.7-min.js"></script>
<script type="text/javascript" src="/assets/scripts/
jquery.serialScroll-1.2.1-min.js"></script>
<script type="text/javascript" src="/assets/scripts/coda-slider.js"
charset="utf-8"></script>
If I take away the jquery.js the lavalamp navigation works if I add it
the coda slider works and not the nav...
Confused..... Please Help!!!!!!