Async upload problem using jquery.form.js

Question

I'm using the jquery.form plugin to asynchronously upload documents in an MVC project.

Taking my lead from this previous answer, here's what I have on the page:

<% using(Html.BeginForm("Create", "JobFile", FormMethod.Post, new { id = "uploadForm", enctype = "multipart/form-data" })) %>
<% { %>
<%: Html.ValidationSummary() %>

    <input type="file" id="fileToUpload" />
    <input type="submit" value="Upload file" />
    <input type="text" id="RelatedFileName" />

<% } %>

<script type="text/javascript" src="../../Scripts/jquery-1.4.1.min.js"></script>
<script type="text/javascript" src="../../Scripts/jquery.form.js"></script>
<script type="text/javascript">
    $(function () {
        $('#uploadForm').ajaxForm(function (result) {
            if (result.errorMessage != '') {
                alert(result.errorMessage);
            } else {
                $('#RelatedFileName').val(result.fileName);
            }
        });
    });
</script>

My problem is that when the page loads I get the following javascript error:

Uncaught TypeError: Object # has no method 'ajaxForm'

This error is found on the line containing

$('#uploadForm').ajaxForm(function (result) {

Can anyone tell me why I'm getting this error?

Answer 1

Check that jquery isn't being included in the page twice.