rem: sfile = parent.QueryInterface(Components.interfaces.nsILocalFile); loadDirectory(); 
add: gotoDirectory(parent); 
context: function goUp() {  try {    var parent = sfile.parent;  } catch(ex) { dump("can't get parent directory\n"); }  if (parent) {    sfile = parent.QueryInterface(Components.interfaces.nsILocalFile);    loadDirectory();  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/b105a9dcb9e30adbe8961f8c5e2bb52ecceeeaee/filepicker.js/buggy/xpfe/components/filepicker/res/content/filepicker.js