suggestion for a explanation on how to add the icon to a site

hi,

First of all i want to thank you for all set of validation tools.

Second i read this today:

http://www.codingforums.com/showpost.php?p=1044750&postcount=3

seems that some people fail to understand what they need to put
instead of the 'referer' when they want to add a validation icon to
the page.

In my opinion this is easy to fix by adding an example or
an explanation of the meaning of referer.

Thank you.