More Validation of Forms

This script carries out various simple checks to try to ensure the fields are filled out correctly. For example, for the URL field, it checks to see if 'http://' is present, and for the e-mail address it looks for the @ symbol. See the comments for how to vary the validation requirements, and how to make the script 'live'; as it is set up at present it just returns a message that all entries are verified OK.

These fields are required:
Your page's URL:
Your page's title:
Your e-mail address:
(The password allows you to change info about your site later). Please do not forget it!
These fields are optional:
Enter up to 20 keywords about your site:
Enter a short description of your site.