using the hook_nodeapi in the view mode
You're missing the first required variable in the signature of your form declaration so things will never work quite as you're expecting.

The function signature should be:

function review_m_form(&amp;$form_state, $node) {


Then you would attach it to your node content like so, remembering to pass the node as a parameter:

$node-&gt;content['form'] = drupal_get_form('review_m_form', $node);