...with a validatebox, the validation warning does not appear until the user clicks on the field. However, with datebox the validation warning shows up instantly when the form is loaded.

I am having this problem too.

Can you recommend a solution?

Sorry - I found the problem.  Wrong filename "validate_username.php" should have been "validate_user_name.php"...

[register.php]

I am trying to set up a validatebox that checks text input.  However, with my test code the validatebox never validates.  The test should return "true" if the user_name typed is "good".

Please advise.

Code below:

register.php

Code:

<input name="user_name" class="easyui-validatebox" data-options="required:true" validType="remote['validate_username.php', 'user_name']" invalidMessage="User name already exists.">

validate_username.php

Code:

<?php

                $user_name = $_REQUEST['user_name'];
                if($user_name == 'good'){
                                echo 'true'; // successful input
                }else{
                                echo 'false';
                }

?>