I have a Join page on my site(which also has a login form).
Is it easy to write java-script to determining if they do not have matching passwords(re-type password for Join form) or a valid email without redirecting you from the page? That way if something is wrong it shows a red star or something asking them to retype the password or enter a valid email address.
Is that something hard to write in java? Then if the information is valid it uses php to create or login the user and redirects them to the home page.