What could you check?

One interesting way in which you could enhance this little module is by using a curious technique called Honeypot Captcha. It is very easy to implement and use, just search for it.

Another way that might be more appropriate for a bigger project, would be to use a jQuery form validation plugin, just like the following:

• http://plugins.jquery.com/project/SimpleValidator

• http://plugins.jquery.com/project/Salid

• http://plugins.jquery.com/project/ec_jq_form_validator

• http://plugins.jquery.com/project/jquery-validator

This is just to name some of them, but there are many more good ones.