Calling to a method controller from jQuery

[eluser]Jose Dueñas[/eluser]
Hi,
I've a controller which inserts into a databse an user:

Code:

class Users extends Controller {
    
    function insert_user()
    {
             $this->Usersmodel->insert("John Smith");
    }
}

What I want to do is do that with jQuery, I've tried from the view:

Code:

$.ajax({url:"http://localhost/index.php/users/insert_user",
                success: function() {
                    // Request has been successfully submitted
                    alert("Succeeded");            
                },
                  error: function() {
                    // An error occurred, do something about it
                    alert("Failed");
                   },
                complete: function() {
                    // We're all done so do any cleaning up.
                    alert("Process has been done");
                }
               });

And I always getting "Failed". It's because I'm trying to load something is not a script.

How could I do this?

Thanks,
Jose