jQuery Validate, need to prevent free email addresses (e.g. Gmail, Hotmail)

Question

I need to add a custom validation rule (or set of rules) to prevent a whole list of email addresses from registering. This is already running server side, but we want to hav

Answer 1

Use your server-side array to generate a jQuery array containing the same values, then use jQuery's .inArray() method to look for it. http://api.jquery.com/jQuery.inArray/

For example:

$('#submit_button').click(function(event){
  var emailAddress = $('#email').val();
  var emailDomain = emailAddress.substr(emailAddress.search('@') + 1)

  if (jQuery.inArray(emailDomain, invalidAddresses))
  {
    alert("Invalid Email Address");
    event.preventDefault();
  }
});