loading jquery twice causes an error?

I have a page where jquery + other js's is being loaded:

<script src="/eiv/javascripts/jquery-1.3.2.min.js" type="text/javascript"></script>
<script src="/eiv/javascripts/jquery.jeditable.js" type="text/javascript"></script>
<script src="/eiv/javascripts/jquery-ui-1.7.1.custom.min.js" type="text/javascript"></script>
<script src="/eiv/javascripts/corner.js" type="text/javascript"></script>
<script src="/eiv/javascripts/jquery.form.js" type="text/javascript"></script>
<script src="/eiv/javascripts/validationdate.js" type="text/javascript"></script>

I am loading tabs as follows:

<%if (tabnum == 1) {%>
        <script type="text/javascript">

            $(document).ready(function(){
                $("#tabs").tabs();
                $("#tabs ul li a").corner('7px top');

               var $tabs = $('#tabs').tabs();
                $tabs.tabs('select', 0);
                dateValidation();
                changeOption();
                deleteConfirmation();
        });
        </script>
<%} else if (tabnum==2) {%>
        <script type="text/javascript">

            $(document).ready(function(){
                $("#tabs").tabs();
                $("#tabs ul li a").corner('7px top');

               var $tabs = $('#tabs').tabs();
                $tabs.tabs('select', 1);

                   changeOption();
                   deleteConfirmation();
        });
        </script>
<%}%>

the validationdate.js is a mine built js that checks dates and other stuff. it has this as the first line:

document.write('<script type="text/javascript" src=""jquery-1.3.2.min.js""></script>');

Problem: Is that in production at time ..this page errors out and give a JS error. This causes the tab's to be not clickable. This error hap