rem: return false; 
add:  if (rv) {   this.disablePrefill = true; } return rv; 
context:     okToPrefill: function () {      if (!window._content.document) {        return false;      }      var formsArray = this.target.ownerDocument.forms;      if (!formsArray) {        return false;      }      var form;      for (form=0; form<formsArray.length; form++) {        var elementsArray = formsArray[form].elements;        var element;        for (element=0; element<elementsArray.length; element++) {          var type = elementsArray[element].type;          var value = elementsArray[element].value;          if (type=="" || type=="text" || type=="select-one") {            return true;          }        }      }      return false;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/79a704b8f6d72565af738516d8950fb8afebb23a/nsContextMenu.js/clean/xpfe/communicator/resources/content/nsContextMenu.js