Smith as equivalent to John Smith or even as johnsmith, and mail systems often limit their users' choice of name to a subset of the technically valid characters.In some cases they also limit which addresses it is possible to send mail to.
All those functions are called from another function.
It sets the focus to the input field until the user supplies a valid value.
An email address identifies an email box to which email messages are delivered.
A wide variety of formats were used in early email systems, but only a single format is used today, following the standards developed for Internet mail systems since the 1980s.
In this page we have discussed how to validate an email using Java Script : An email is a string (a subset of ASCII characters) separated into two parts by @ symbol.