Annoyed with form submitters that keep fills the email form field with an invalid email? You can use javascript’s regular expressions to validate it. There’s so many regular expressions form to validate e-mail on the internet but many of them is very long and difficult to understand to modify to suit my need. The regular expressions is expressed below:

/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,60})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i