e = mimeTypes.keys();
while(e.hasMoreElements()) {
String major = (String)e.nextElement();
Menu imenu = new Menu(major);
imenu.addActionListener(this);
minor = (String[]) mimeTypes.get(major);
for(int i=0; i<minor.length; i++) {
item = new MenuItem(minor[i]);
addMenuListener(item, major + "/" + minor[i]);
imenu.add(item);