Set - 5

Question 21 :

How do you show which page you're on (in a menu)?

Answer :

If PHP is not available to you, you could use the cascade. Put an id in your body tags and an id in each of your 'a' tags for the links.
Let's say on page one you have this:
<body id="page1">
<a id="page1link" href="page1.htm">page one</a>

In your CSS, you can have something like this:
#page1 a#page1link {

Question 22 :

How can I specify two different sets of link colors?

Answer :

By classifying each set of links and then attaching desired color to each set.

A.set1:link {color: some_color; background: some_background_color}
A.set1:visited {color: some_color; background: some_background_color}
A.set1:active {color: some_color; background: some_background_color}

A.set2:link {color: some_color; background: some_background_color}
A.set2:visited {color: some_color; background: some_background_color}
A.set2:active {color: some_color; background: some_background_color}

You can name set1 and set2 any way you like as long as the names are made up of letters a-z, A-Z, digits 0-9, period, hyphen, escaped characters, Unicode characters 161-255, as well as any Unicode character as a numeric code. 
Note: to avoid conflict with user's settings a background property (background color) should also be specified together with the color property (foreground color).

Question 23 :

How can I place multiple blocks next to each other?

Answer :

In theory, the following will produce 4 "columns":
<DIV style="float: left; width: 25%;">Block 1</DIV>
<DIV style="float: left; width: 25%;">Block 2</DIV>
<DIV style="float: left; width: 25%;">Block 3</DIV>
<DIV style="float: left; width: 25%;">Block 4</DIV>

Each "column" will occupy 25% of the screen. This relies on a correct implementation of float, which cannot be said of many legacy browsers. If you cannot accept display variances in older browsers, then it may be best to fall back to table-based solutions. 

2. By making the block an inline element and then use text-align property

<DIV STYLE="text-align: center">
<TABLE STYLE="display: inline">

This technique depends on the incorrect implementation of text-align behavior in older browsers. It will likely cease to work in future CSS-conformant browsers, and eventually it will probably not be a viable solution.