--------------------------------------------------
        | /home/foo/baz/bar.html                         |
        --------------------------------------------------
        |  | textfield |  |go|                           |
        --------------------------------------------------
        |    display the file in the window              |
        | if it does not exist, display an error ms      |
        | if the file is a directory, show its           |
        | contents.                                      |
        |                                                |
        |                                                |
        --------------------------------------------------