JQuery Validation

[eluser]RobbieL[/eluser]
Cheers for the responses. I'm still at work, but can provide some code off the top of my head.

Code:

$(function(){
      $("#registration_form").submit(function(){
           $.ajax({
                   url: "http://localhost:8888/project/index.php/registration/validate",
               data: "id="+$('#username').val(),
               success: function(){
                    alert('Success');
               }
            });

            return false;
       });
});

It's just from memory, so it might not be 100% correct.