Severe
- Use of FONT tag
- Automatically-generated IDs, eg. Table_01, style3, style4
- Multiple HTML, TITLE tags
Pretty Bad
- A which has no content inside its link (displays as no link) unless its a A NAME
- BR or P followed by DIV or /DIV
- BR followed by BR followed by BR
- Use of cellpadding, cellspacing, bgcolor, bordercolor or background
- Two IDs repeated on the same page
- TDs which only contain IMGs (indicate likelihood of table-based layout)
- STYLE outside of HEAD
Moderate
- IMG with a width or height of 1
- Use of NBSP
- Use of align, valign
Trivial
- Use of B instead of STRONG
- Use of I instead of EM
Warnings
- INPUT elements outside of FORMs