* render form value needed values and javascript code.
*/
public static void addHiddenFields(RenderingContext arc)
{
FormData fData = arc.getFormData();
fData.addNeededValue(XhtmlConstants.EVENT_PARAM);
fData.addNeededValue(XhtmlConstants.SOURCE_PARAM);
fData.addNeededValue(XhtmlConstants.PARTIAL_PARAM);
fData.addNeededValue(XhtmlConstants.VALUE_PARAM);
}