Add Button wo fires own function

Hi,

Not sure about what you exactly want to do but you can create a link button which reloads its current page.

array( 
    'type'          => 'submit', 
    'value'         => 'This is a test', 
    'href'          => '', 
    'attributes'    => array( 
        'class' => 'button button-secondary unique-class-for-ajax-event', 
    ),     
)

Then you can add your JS script to trigger your own event assigning to the button, in the above case, using the class selector .unique-class-for-ajax-event.

Hope this helps.

You can use the validation callbacks. In your extended class, add the validate() method.

Something like this,

    public function validate( $aInputs, $aOldInputs, $oAdminPage, $aSubmitInfo ) {
    
        // do your own stuff here
        
        return $aInputs;
    }

the forth parameter may be omitted if the form is not for admin pages such as meta boxes.