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: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/0899aff595a683dad69f52cbca6853ee62258b88/help.js/clean/extensions/help/resources/content/help.js