$("#form1").validate is not a function

<script type="text/javascript">
<!--
$(document).ready(function() { 
      $("#form1").validate({ 
        rules: { 
         budget: {
            required: true,
             minlength:3
        } ,
       duration: {
            required: true,
            digits:true
        }, 
         town: {
            required: true,
             minlength:2

        },

       content: {
            required: true,
            minlength:300 

        }
         }, 
        messages: { 


        } 
          }); 
        });
        -->
</script>

Two jquery files are included.

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript" src="../common/jquery.validate.js"></script>

are included. There is nothing wrong with the inclusion.

I got an error message

$("#form1").validate is not a function What's wrong?