#top-navigation li:hover ul {
display: block;
}
There’s only a tiny but irritating cosmetic issue left. Note that the inner unorder ed list
is fully contained within the outer list. As a consequence, the outer list expands as the
inner list gets block display and shrinks as the inner list hides. Because of that, the
rest of the page content moves down when a sub-menu appears, an d moves up when
it disappears.
If yo u change position of the inner list to absolute, then the outer list w ill no
longer contain the inner list, which solves the problem. Besides, it’s a good idea to set
the list’s width back to auto. This is the complete rule:
#top-navigation li ul {
margin-top: 0;
display: none;
position: absolute;
width: auto;
}
Here we are—a really neat two-level navigation menu .
Mike: I have one more question. If I wanted to include the same menu to several
pages of my website, is there a way to include it from an external file so that I don ’t
have to co py the code to each of the pages? I mean, just like we included external CSS
using th e <link> element.
6.2 Server Side I ncludes
Professor: One of th e most straightf orward approaches is to use so-called Server Side
Includes or SSI. SSI is a simple server-side scripting langu age used mainly for the
Web. Here’s how it works.
First, you must configure the Apache web server so it will interpret your SSI within
.html files. If you don’t want to mess with the server’s config uration file, you can create
a plain text file named
.htaccess and save it to the root directory of your we bsite to
enable SSI throughout your site. Put the following two lines into the
.htaccess file:
104 Meeting 6. Behavior
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