Not really important, but I've noticed that when people are using classes in css some use #name and some use .name. What's the difference, or is it one of those things like .html and .htm?

# indicates an id.
For instance, if you had
#blah
{color: #000; }

in your HTML you'd have <div id="blah"></div> (or span or p, as the case may be ;))
You can only use an id on a page once. Think of id as "individual."

Now, . indicates a class. If you had:
.blah
{color: #000;}

You would have
<div class="blah"></div> (Or span class or p class, etc,)
Classes you can use more than once. Think of classes as a group of people who share the same traits (ie, students in a classroom).

Hope that explanation made sense. :P

oh, ok. Well then, this whole time I've been using classes once when I should've used ids. Guess I could refrane from that this time round. Just thought I would clear that up before I started css for my new layout.

oh, ok. Well then, this whole time I've been using classes once when I should've used ids. Guess I could refrane from that this time round. Just thought I would clear that up before I started css for my new layout.
Both classes and ids have their uses. If you only need to use it once on a page, id would be ideal, ie, for layout positioning attributes and such, but classes are great if say, you wanted to have some text be another color from the default. :)
Both are extremely useful. :D