rem: return ORBEON.util.Dom.getStringValue(helpElement); 
add: return helpElement == null ? "" : ORBEON.util.Dom.getStringValue(helpElement); 
context:     getHelpMessage: function(control) {        var helpElement = ORBEON.xforms.Controls._getControlLabel(control, "xforms-help");        return ORBEON.util.Dom.getStringValue(helpElement);    },
meta: 9823	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9823/da64dd4da9d5f45f2fa11ad037a0de3ad85f8954/xforms.js/buggy/src/examples/web/ops/javascript/xforms.js