In the Launch Web Page action, you are required to add a URL to the Address box:
When the user runs your publication and triggers this action, the system will attempt to work out if this file is located on the web from the hard disk of your computer. However, if you want, you can explicitly state where it should look for the URL.
If the URL is on the web use this protocol:
http://
e.g. http://www.digitalworkshop.com
If the URL is on the hard disk or your CD-ROM, use this protocol:
file://
e.g. file://d:\webpages\index.htm
When you use the file:// or http:// protocols, the system knows exactly where to look for your file.