How to dynamically keep input field empty when select box option is no?
<p>Ì have form where writing on input field autofills other input field while user types email</p>

<pre><code>$("#edit-submitted-yhteystiedot-sahkoposti").keyup(function(){
    $("#edit-submitted-saannot-newsletter-newsletter-email-address").val(this.value);
});
</code></pre>

<p>The thing is that if user does not want to receive newsletter and chooses no option for select box, the Input field with ID #edit-submitted-saannot-newsletter-newsletter-email-address should remain empty, even if user makes changes to default email field. ID of SELECT is #edit-submitted-saannot-haluan-uutiskirjeen</p>
