HTML and CSS Reference
In-Depth Information
FORMAT
#IDselector { declaration ; }
EXAMPLE
#menu1 { font-family: arial;
font-size: big;
color: blue; }
To apply an ID to an HTML tag, use the
id
attribute. The attribute will be assigned the
same name given to the ID selector; so, to apply an ID selector to a
<p>
tag, you would
stipulate
<p id=name>
where
name
is the name of the ID selector (see Example 14.17).
The
id
Attribute.
When JavaScript enters the picture, the
id
attribute is used to iden-
tify each element as a unique object so that it can be manipulated in a JavaScript pro-
gram. The
id
should be unique for an element and not used more than once on a page.
If you need to use the style more than once for multiple elements, it would be better to
use the class selector instead. The ID selector can be used with a class selector of the
same name, as
#big, .big { }
.
EXAMPLE
14.17
<html>
<head><title>ID's</title>
1
<style type="text/css">
2
p
{ font-family:arial,sans-serif,helvetica;
font-style:bold;
font-size:18
}
3
#block {
/*
The ID selector
*/
color: red;
text-decoration:underline;
}
</style>
</head>
<body >
4
<p>
When making my point, I will get quite red and underline
what I say!!</p>
5
<p id="block">
This text is red and underlined!!</P>
6 <p>and now I am somewhat appeased.
</body>
</html>
EXPLANATION
1
This is the start of a style sheet; it is placed between the
<head></head>
tags in the
document.
Continues
