<div> tags

[yana]

What is the difference between using ID and CLASS? Is it better to use one than another???
For example...

<div id="frame">...</div>  and <div class="frame">...</div>
#frame {
width:777px;
height:100%;
margin-right:0px;
margin-left:0px;
margin-top:0px;
margin-bottom:0px;
padding:0px;
text-align:left;
background-color: #FFF;
}

.frame {
width:777px;
height:100%;
margin-right:0px;
margin-left:0px;
margin-top:0px;
margin-bottom:0px;
padding:0px;
text-align:left;
background-color: #FFF;
}

[AndyB]

id should only be used ONCE, class can be used many, many times, in the same file.

[obsidian]

[quote author=AndyB link=topic=108507.msg436588#msg436588 date=1158594893]
id should only be used ONCE, class can be used many, many times, in the same file.
[/quote]

and, in addition to that, each element can only carry one id, but each tag could hold many, many classes as well

[yana]

What do u mean by "each element can only carry one id"???

Something along these lines?? <div id="test"> is correct but <div id="test" id="test2"> is incorrect...while <div class="test"> is correct and <div class="test" class="test2"> is correct as well????????

[obsidian]

actually, it's this: the following two lines show how to apply a single id and multiple classes
[code]
<div id="myID"></div>

<div class="red bold someStyle"></div>
[/code]