jquery show hide not working in IE or chrome

The following code works fine in Firefox but not in IE or Chrome.  Any ideas why?

I am referencing http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js

<script type="text/javascript">
    $(document).ready(function() {
        $('#textbox').hide();
        // shows the slickbox on clicking the noted link
        $('#go').click(function() {
            var Length = $("#name").val().length;
            if (Length > 0) {
                $('#textbox').show('fast');
                $("#secondTextbox").val('');
                return false;
            }
        });
    });

</script>