How to add reset button to forms?
My preferred way to do this is.

Add the button to your form like so:

$form['options']['reset'] = array(
  '#type' =&gt; 'submit',
  '#value' =&gt; t('Reset'),
  '#submit' =&gt; array('MY_MODULE_FORM_ID_reset'),
);


Then create the reset function like so:

function MY_MODULE_FORM_ID_reset($form, &amp;$form_state) {
  $form_state['rebuild'] = FALSE;
}


No Javascript, no markup.