You may use this method on your personal 'non-profit' web site without seeking my permission.
A link back to CSS PLAY is always appreciated.
Commercial usage is also permitted without seeking approval, but I would ask that a donation is considered to support my work on CSS PLAY.
If you are having problems integrating any of my demonstrations into your website then I now offer a service to fault find and correct any errors that you may have introduced.
Please email me for more information.
Your donations keep CSS PLAY running.
If your donation is for the use of a demo then please email me with the demo url after making your donation.