这样就行了吧,具体的你可以还要删除些函数,不删也没关系,就多些垃圾。 //  aux1=appendChild(foldersTree,folderNode("javascript"));
   aux2=appendChild(foldersTree,leafNode("javascript"));
 //    aux2=appendChild(aux1,leafNode("sandy"));
//   aux1=appendChild(foldersTree,folderNode("java study"));
        aux2=appendChild(foldersTree,leafNode("java study"));
//     aux2=appendChild(aux1,leafNode("sandy1"));