jQuery Validation

 $(document).ready(function() {  
   $("#signupForm").validate({  
  rules: {  
   firstname: "required",    
   username: {  
   required: true,  
   minlength: 2  
   },  
   password: {  
   required: true,  
   minlength: 5  
   },  
   confirm_password: {  
   required: true,  
   minlength: 5,  
   equalTo: "#password"  
   },  
   email: {  
   required: true,  
   email: true  
   },  
   agree: "required"  
  },  
  messages: {  
   firstname: "Please enter your firstname",    
   username: {  
   required: "Please enter a username",  
   minlength: "Your username must consist of at least 2 characters"  
   },  
   password: {  
   required: "Please provide a password",  
   minlength: "Your password must be at least 5 characters long"  
   },  
   confirm_password: {  
   required: "Please provide a password",  
   minlength: "Your password must be at least 5 characters long",  
   equalTo: "Please enter the same password as above"  
   },  
   email: "Please enter a valid email address",  
   agree: "Please accept our policy"  
  }  
  });  
 });