In order for CSS to understand the page, we must tell him a little about the data. We need to tell what is body and what is navigation, and to do this we can use the div tag.
So let's add a div tag that will surround the body data, and one for the navigation.
Filename: class.page.php
<?php
class page
{
function __construct($title)
{
print "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">\n";
print "<html>\n";
print "<head>\n";
print " <title>".$title."</title>\n";
print " <link rel=\"stylesheet\" title=\"std\" ".
" media=\"screen\" href=\"screen.css\" type=\"text/css\">\n";
print " <meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\n";
print "</head>\n";
print "<body>\n";
print "<div id=\"body_data\">\n";
print "<!-- --------------------------- -->\n";
}
function __destruct()
{
print "<!-- --------------------------- -->\n";
//end body_data
print "</div>\n";
print "<div id=\"navigation_data\">\n";
print " <a href=\"first.php\">The first page</a><br>\n";
print " <a href=\"second.php\">The second page</a><br>\n";
print "</div>\n";
print "</body>\n";
print "</html>\n";
}
}
?>
Then we tell css where to place the stuff, and here we can use absolute placement.
Filename: screen.css
body {
background: #000000;
color: #FFBF00;
}
#body_data {
position: absolute;
top: 50px;
left: 20px;
}
#navigation_data {
position: absolute;
top: 10px;
left: 20px;
}
Notice that the navigation now is above the page data, and that we still have not changed anything else.
Filename: first.php
<?php
require_once("class.page.php");
$page = new page("My first page...");
?>
<h1>Hello</h1>
<p>What a nice little page</p>
Filename: second.php
<?php
require_once("class.page.php");
$page = new page("And the second page...");
?>
<h1>Hello again.</h1>
<p>Just another page.</p>
Of course this is only a very basic css example, and there is a lot of css tutorials out there so at this point it is time to start experiment and actually use some other colors...
There is a nice project called "Any Browser Campaign", they have done a nice basic design guide if you wish to have high accessibility on your page.
Good luck.