User Defined ID - CSS

254 100+

i have this in my text book:

An ID is just like a class, but can only be applied ONCE in a document....

what does it means?

i have tested this on my mozilla browser, and it works fine. This code contain same ID and used TWICEly.

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<html>

<head>

<title>ID example</title>

<style type="text/css">

<!--

#title { color: red }

h1#color { color: blue }

-->

</style>

</head>

<body>

<h2 id="title">The use of the ID example</h2>

<h1 id="color">Blue header but only conce</h1>

<h1 id="color">BlaBlaBla</h1>

</body>

</html>

So what does it means by "Can only be applied ONCE in a document?

Jan 30 '07 #1

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1526

ConanTheVegetarian

So what does it means by "Can only be applied ONCE in a document?

Just what it says. You should only use an ID to identify a single element. If you choose to break the standards your page will not be valid HTML and may not work in all browsers.

In order to apply a style to a number of elements you need to define a class, eg.

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<style>

.features {

  border : solid 1px red;

  color : #444;

  font-weight : bold;

}

</style>

and then in your code you can apply this class to any selected element eg.

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<h1 class="features">test</h1>

<p class="features">test</p>

Jan 30 '07 #2

nickyeng

254

100+

that means code that i provided above might not works on all the browsers, and it is better define a CLASS instead of ID if i want to use number times of that element ?

Jan 31 '07 #3

ConanTheVegetarian

That's right.

Jan 31 '07 #4

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User Defined ID - CSS

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