Mine

    <action-definition> 
      <component-name>JavascriptRule</component-name>
      <action-type>JavaScript</action-type>
      <action-inputs> 
        <region_query_result type="result-set"/> 
      </action-inputs>
      <action-outputs> 
        <strHtml type="string"/> 
      </action-outputs>
      <component-definition> 
        <script><![CDATA[strHtml="<select id='zoneSelect' onchange='javascript:updateAddresses()'><option>Escolha...</option> ";
for (var rc=0; rc < region_query_result.getRowCount(); rc++){
	strHtml+="<option value='" +region_query_result.getValueAt(rc,0) +"'>" ;
	strHtml+=region_query_result.getValueAt(rc,0) + "</option>";
}
strHtml+="</select>";]]></script> 
      </component-definition> 
    </action-definition>