Inline Validation design best practices (with examples) - Vitaly Friedman

Nothing is more frustrating than filling out a badly designed form. Form validation is a process where a web-form checks if the information provided by a user is correct, this could something be a source for frustration. How can we design better online forms? Vitaly Friedman, Editor and co-founder of Smashing Magazine tells all in our "Fixing Bad UX" Series.