gohankid77 - 5:03 am on Oct 14, 2004 (gmt 0)

A couple of things to note before someone gets started.

When using XHTML:
1) make sure all of your elements and attributes are lowercase.
2) make sure that all tags are closed. For example, in HTML, you could have <img src="image.jpg" alt="image">. In XHTML, it must be <img src="image.jpg" alt="image" />. One exception is the <p> tag. It must use <p> and </p>.

Markup validation [validator.w3.org] helps a lot!
So does CSS validation [jigsaw.w3.org]!