Google Spreadsheets has a new feature for cell validation. It will check data within a cell to see if it matches certain criteria, such as email or URL.
A directory of videos from Nortel about facets of the Internet, including history of the Internet, browsers, search engines, searches, netiquette and Web page validity. Well done.
In this walkthrough we'll go through the process of converting the design concept from PSD document right through to completed HTML and CSS mockup, complete with clean and valid code, a few touches of CSS3 and some quick fixes to help out old IE6.