<span xmlns:nevow="http://nevow.com/ns/nevow/0.1" xmlns:athena="http://divmod.org/ns/athena/0.7" nevow:render="liveElement"
><button class="methanal-action-button" nevow:render="button"
    ><athena:handler event="onclick" handler="invoke" /></button
></span>

<span xmlns:nevow="http://nevow.com/ns/nevow/0.1" xmlns:athena="http://divmod.org/ns/athena/0.7" nevow:render="liveElement"
><button class="methanal-action-button methanal-submit-disabled" disabled="disabled" nevow:render="button"
    ><athena:handler event="onclick" handler="invoke" /></button
></span>

Disable form action buttons by default.
Disable form action buttons by default.