validation plugin regex

validation plugin regex

hey guys im wondering how you would add a regex pattern to a field with jquery's validation plugin please?
also ive addded eqaul to conditions to my validation...is there a way to add a message if not equal also?

thank you...my working code is below

  1. $(function()
    {
        $("#register-form").validate({
            rules:
            {
                username: "required",
                first_name: "required",
                surname: "required",
               
                email_address:
                {
                    required: true,
                    email: true
                },
               
                confirm_email_address:
                {
                    required: true,
                    email: true,
                    equalTo: "#email_address"
                },
               
                password:
                {
                    required: true,
                    minlength: 5
                },
               
                confirm_password:
                {
                    required: true,
                    equalTo: "#password"
                },
               
                agree: "required"
            },
                   
            messages:
            {
                username: "Please enter a username",
                first_name: "Please enter your firstname",
                surname: "Please enter your surname",
                email_address: "Please enter a valid email address",
                confirm_email_address: "Please confirm your email address",
                password: "Please provide a password",
                confirm_password: "Please confirm password",
            },
           
            submitHandler: function(form)
            {
                form.submit();
            }
        });
    });