rem: loadURI(uri); 
add: if (uri) loadURI(uri); 
context: function displayTopic(topic) {    // Get the page to open.    var uri = getLink(topic);    // Use default topic if specified topic is not found.    if (!uri) {        uri = getLink(defaultTopic);    }    // Load the page.    loadURI(uri);}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/80c75a4ba0fb2cddfbfb96ef3ca370e6a36d8fac/help.js/clean/toolkit/components/help/content/help.js