 <p>I do not think it is that easy.</p> <p>According to the specs at <a href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#attr-fae-form" rel="nofollow">http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#attr-fae-form</a></p> <ol> <li>The form owner must exist in order to be set to an element.</li> <li>The element must be in the document in order to alter its form owner</li> </ol>