Create error if two fields don't match

I have a script with an account_create_page, which requires user name, password, name, address, email address etc.

I wanted the user name to be the email address, so for simplicity I changed the field text for "User Name" to "Email Address" and changed the field text for "Email Address" to "Re-Confirm Email Address".

Is there a way to add code that will get an error if these two fields don't match each other?

thanks

 

If you want to do this in PHP then siply all you need to do is:

if($_POST['email']!=$_POST['confirm-email'])
{
    // error
}

PHP:

I assume here you are sending data via POST and your input fields have names: email and confirm-email.