<select id="profile_id" name="profile[id]">
</select>
<script type="text/javascript">
1
2//<![CDATA[
3new Form.Element.EventObserver('profile_id', function(element, value) {new Ajax.Updater('profilelist', '/profiles/foo', {asynchronous:true, evalScripts:true, parameters:'id=' + value + '&authenticity_token=' + encodeURIComponent('w9I8CwwPQ787XEvNeoSqPnQlZ429vjd5SW+ZCPSvLS8=')})})
4//]]>
</script>
<input id="property_id" type="hidden" value="2" name="property_id"/>
<input type="submit" value="Submit" name="commit"/>
</form>