js email validation

emailvalidation.js

function validateEmail(uEmail) {
  var filter = /^(([\w-\.]|([-]|[_]|[.]|[+]))+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
  if (filter.test(uEmail)) {
    return true;
  } else {
    return false;
  }
}