If I had to make a choice, I'd prefer to use a polyfill [1] implementing the constraint validation API [2] instead of using a proprietary API. [1] http://afark

If I had to make a choice, I'd prefer to use a polyfill [1] implementing the constraint validation API [2] instead of using a proprietary API. [1] http://afarkas.github.com/webshim/demos/demos/webforms.html http://afarkas.github.com/webshim/demos/demos/webforms.html [2] https://developer.mozilla.org/en-US/docs/HTML/HTML5/Constraint_validation https://developer.mozilla.org/en-US/docs/HTML/HTML5/Constrai...