In special cases, maybe. Basic validation (Email looks like email, number contains no text...) is done by the browser automatically if you use semantically corr

In special cases, maybe. Basic validation (Email looks like email, number contains no text...) is done by the browser automatically if you use semantically correct <input> types: http://diveintohtml5.info/forms.html#validation http://diveintohtml5.info/forms.html#validation