Email validation to allow 2 domains

[ombrenelcielo]

Hi everyone,
I needed to create a validation form to allow only 2 domains (basic check if @abd.com or @asd.com and allow those only).

It's plain javascript, can you give me some suggestions?



as of today I do the validation like this:

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;
  }
}

 

[angelwatt]

Here's a tweaked function that uses a regular expression to check for two domains being present. In this case the valid domains are thatdomain.com and thisdomain.com. It also ensures that there are at least 2 characters before the @ characters and no spaces anywhere. I added an else piece simply for testing purposes.

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.');
	}
}

 

[jtara]

Of course you realize that Javascript client-side validation is no validation at all, right?

It's a nicety. You still need server-side validation.

 

[ombrenelcielo]

thanks for the infos,
I have a script running server side to clean up the domains different than the ones I want from the DB, and JS on the client side helps a bit to have more coherent data