Email validation to allow 2 domains

hi everyone,
needed create validation form allow 2 domains (basic check if @abd.com or @asd.com , allow only).

it's plain javascript, can give me suggestions?



of today validation this:

php:

function validateform()
{
var x=document.getelementbyid("user_email").value;
var atpos=x.indexof("@thisdomain.com");
var dotpos=x.lastindexof(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
  {
  alert("please use your @thisdomain.com email address");
  return false;
  }
}

 

here's tweaked function uses regular expression check 2 domains being present. in case valid domains thatdomain.com , thisdomain.com. ensures there @ least 2 characters before @ characters , no spaces anywhere. added else piece testing purposes.

php:

function validateform() {
    var x = document.getelementbyid("user_email").value;
    var regex = new regexp(/^[\w\.\+_-]+[\w]+@(this|that)domain\.com$/);
    // validate email address
    if (!regex.test(x)) {
        alert("please use your @thisdomain.com or @thatdomain.com email address.");
        return false;
    }
    else {
        alert('address valid.');
    }
}

 

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