jQuery Function to Validate Email

I really don’t like to use plugins, especially when my form only has one field that needs to be validated. I use this function and call it whenever I need to validate an email form field.

 function validateEmail($email) {
  var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
  return emailReg.test( $email );
}

and now to use this

if( !validateEmail(emailaddress)) { /* do stuff here */ }
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