In Tim Berners-Lee's Blog entry, Reinventing HTML, It seems W3C failed to implement the new XHTML standard amongst the developers. Thanks to all easy-go browsers, which will not validate tags, attributes, etc...

456bereastreet.com suggests some of the changes required in the new HTML version, I'd say version 5.0. Some of the points mentioned are.

• New attributes that will make forms easier to validate: required for input, textarea, and select elements, maxlength for textarea elements.
• The reappearance of the start and value attributes for ol and li elements respectively.
• Stricter, XHTML-like syntax: make lowercase required for all element and attribute names, make quoted attribute values required, require all end tags that are currently optional.

Changes required for HTML v 5.0

• Browsers shouldn't render anything if there is any major error in Document, or atleast give a warning
• Direct Form validation support: no need of Javascript for trivial validations
• A "TABLE" like tag that works as well as "TABLE" for layout and positioning, Developers are sick of making CSS work for all browsers

Many a times, on your page, you need to have a JavaScript pop-up window for Slideshow, gallery, comment form, etc. But you also want to have your site WAI compatible. What do you do ?

The idea is to pop-up windows in Browsers that support JavaScript and provide actual href value to the Anchor tag a. But also provide an onclick event that pops up the window.