1 $().ready(function () {
 2             // validate signup form on keyup and submit
 3             $("#signupForm").validate({
 4                 rules: {
 5                     firstname: "required",
 6                     lastname: "required"
 7                 },
 8                 messages: {
 9                     firstname: "Please enter your firstname",
10                     lastname: "Please enter your lastname"
11                 }
12             });
13 });

 1 <form class="cmxform" id="signupForm" method="get" action="">
 2             <fieldset>
 3                 <legend>Validating a complete form</legend>
 4                 <p>
 5                     <label for="firstname">Firstname</label>
 6                     <input id="firstname" name="firstname" type="text" />
 7                 </p>
 8                 <p>
 9                     <label for="lastname">Lastname</label>
10                     <input id="lastname" name="lastname" type="text" />
11                 </p>
12                 <p>
13                     <input class="submit" type="submit" value="Submit" />
14                 </p>
15             </fieldset>
16         </form>