add: return null; } 
context:   function findParentNode(node, parentNode)  {    if (node && node.nodeType == Node.TEXT_NODE) {      node = node.parentNode;    }    while (node) {      var nodeName = node.localName;      if (!nodeName)        return null;      nodeName = nodeName.toLowerCase();      if (nodeName == "body" || nodeName == "html" ||          nodeName == "#document") {        return null;      }      if (nodeName == parentNode)        return node;      node = node.parentNode;    }    return null;  }
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/ded00cf5efa2c77a422c9c2753e9385d56a49622/contentAreaUtils.js/buggy/suite/common/contentAreaUtils.js