Ajax success event not working

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I have a registration form and am using $.ajax to submit it.

This is my AJAX request:

$(document).ready(function() {
    $("form#regist").submit(function() {
        var str = $("#regist").serialize();
        $.ajax({
            type: 'POST',
            url: 'submit1.php',
            data: $("#regist").serialize(),
            dataType: 'json',
            success: function() {
                $("#loading").append("<h2>you are here</h2>");
            }        
        });
        return false;        
    });
});

In my submit1.php file I check for the existence of fields email address and username in the database.
I wish to display an error message if those value exist without a page refresh.

How can I add this to the success callback of my AJAX request?

16 Answers
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