Just a tip to all you aspiring web designers, please use lower case when creating web pages. I just had to clean up a bunch of HTML with a mix of UPPER and lower case tag names and it was not fun. The World Wide Web Consortium (W3C) had to say on the matter:

Element and attribute names must be in lower case
XHTML documents must use lower case for all HTML element and attribute names. This difference is necessary because XML is case-sensitive e.g. <li> and <LI> are different tags.

If you are unsure about your code, test it using these websites and save your fellow developers from having to clean up your mess:

HTML Validator: http://validator.w3.org
CSS Validator: http://jigsaw.w3.org/css-validator