Jquery validation not working

Jquery validation not working

Hi all,
The validation doesn't work on my FF 20.0.01 with code below. Nothing happened.
<!DOCTYPE html>
<html>
<head>
    <title>Home Page</title>
    <link href="/Content/Site.css" rel="stylesheet" type="text/css" />
    <script src="/Scripts/jquery-1.9.1.js" type="text/javascript"></script>
    <script src="/Scripts/jquery.validate.js" type="text/javascript"></script>
   <script type="text/javascript">
       $(function () {
           ("#form1").validate({
               rule: { txt1: { required: true, maxlength: 10} },
               message: { txt1: { required: " required", maxlength: "maxlength"} }
           });
       });
    </script>
</head>
<body>
   
  <form id="form1" action="" method="get">
   <input type="text" id="txt1" />
   <input type="submit" id="sub1" value="submit" />
    </form>
 
</body>
</html>
Why?
TIA
-t