rem: uri = getLink(defaultTopic); 
add: uri = getLink(defaultTopic); 
context: function displayTopic(topic) {  if (!topic)    topic = defaultTopic;  var uri = getLink(topic);  if (!uri) // Topic not found - revert to default.      uri = getLink(defaultTopic);  loadURI(uri);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/932bbac5b36a82e3cdb24fb38c9bcfacaf2f9e22/help.js/buggy/extensions/help/resources/content/help.js