CSS question: id == class?

[Xah Lee]

In CSS, what's the difference between "id=" and "class="?

i thought id is CSS2 version equivalent for a shorter name. But
apparently if i replace class with id on a webpage they don't work...
thanks.

Xah
(e-mail address removed)
http://xahlee.org/PageTwo_dir/more.html

 

[Bjoern Hoehrmann]

* Xah Lee wrote in comp.text.xml:

In CSS, what's the difference between "id=" and "class="?

http://css-discuss.incutio.com/?page=ClassesVsIds

 

[Peter Flynn]

In CSS, what's the difference between "id=" and "class="?

i thought id is CSS2 version equivalent for a shorter name. But
apparently if i replace class with id on a webpage they don't work...
thanks.

ID values must be unique per document. They identify a single object.
That's why they're called "IDs".

Class values can occur arbitrarily.

///Peter