noscripttags. Include a link to bypass the detection if you wish.
This movie is an example of the new ExternalInterface class in Flash 8. You will need to upgrade your Flash player to v.8 or higher to view this (if you have 6.0.65 or higher, you will be able to use Express Install), and you will need to be using a compatible browser. Nearly all modern browsers support ExternalInterface, however it was only added to Safari in the latest version, so versions older than 1.3 will not support ExternalInterface.
Validate XHTML and CSS