Custom Page Question

I have a custom page with CheckBox and DirRequest.

Is it possible to disable the DirRequest if the CheckBox is not checked and enable it when the user selects the CheckBox.

I can check the status of the CheckBox when I enter the page or in the leave function, but how can I do it during the time the user is in this page and "plays" with the CheckBox ?

Thanks.

Found how to do it.
Thanks.