We’ve done form validation for quite a few sites through PHP, JavaScript, or both. It’s a pretty common thing in web development especially with all the spam bots around. Also it keeps things clean when capturing user input.

Woork has three JavaScript implementations for form validation. The first implementation with MooTools seems pretty clever. The other two seem pretty standard.

If you have any interesting links for us to review regarding form validation, we would be interested in viewing them and also sharing in the blog.