rem: if (link instanceof Components.interfaces.nsIRDFLiteral) 
add: if (link instanceof Components.interfaces.nsIRDFLiteral && link.Value) 
context: function onselect_loadURI(tree) {  var row = tree.currentIndex;  if (row >= 0) {    var resource = tree.view.getResourceAtIndex(row);    var link = tree.database.GetTarget(resource, NC_LINK, true);    if (link instanceof Components.interfaces.nsIRDFLiteral)      loadURI(link.Value);  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/e877c267f4ca2e54c05bb6b6328ad735e98d9c17/help.js/clean/extensions/help/resources/content/help.js