What you're going to want to do is add a class to whatever menu item is currently active. For example, the HTML markup for index.html
would look like this:
<div id="menu">
<ul>
<li class="active"><a href="index.html">Home</a></li>
<li><a href="early.html">Growing Up and School</a></li>
<li><a href="career.html">Films</a></li>
<li><a href="jamesbond.html">James Bond</a></li>
<li><a href="gallery.html">Pictures</a></li>
</ul>
</div>
And the markup for career.html
would look like this:
<div id="menu">
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="early.html">Growing Up and School</a></li>
<li class="active"><a href="career.html">Films</a></li>
<li><a href="jamesbond.html">James Bond</a></li>
<li><a href="gallery.html">Pictures</a></li>
</ul>
</div>
Then style the class accordingly:
.active {
background-color: red;
}