Question

I want to do this but dont know how to do it in JavaScript.

if (Email == "*aol.com" || Email == "*hotmail*" || Email == "*gmail*" || Email == "*yahoo*") 
    {
     alert("No Hotmail, Gmail, Yahoo or AOL emails are allowed!");  
     return false;
    }

Any way around this?

Answer 1

First, I think your searches are a bit too generic. (e.g. what if someone has the email address, “[e-mail]“?

Try this:

var notAllowed = /@(?:aol|hotmail|g(?:oogle)?mail|yahoo)\.com$/i;
// You may want to cover other domains under .co.uk etc.

if ( notAllowed.test(emailAddress) ) {
    alert("No Hotmail, Gmail, Yahoo or AOL emails are allowed!");  
    return false;
}

I have to ask, why are you disabling people from using these email addresses? (out of interest)

Also, this really should be done on the server-side (I’m assuming you’re not using SSJS)