i want to add my own javascript file to dataobject_manager popup

in DataObject_Manager.php add

Requirements::javascript('dataobject_manager/javascript/test.js');

test.js

(function($) {

alert('start');

        var option = $('#DataObjectManager_Popup_AddForm_FileID option:selected').text();
        alert(option);
})(jQuery);

the alert is shown when i reload the CMS but the next rules doesn't work

also this rule doesn't work too

$('.footer').css('background-color','#000');

.footer --> footer div of dataobject_manager popup

any idea ?

I would think you'd put it in the getCMSFields() function for your dataobject, right? DataObjectManager is not the right controller for the popup.