Thank you I was wondering if there was an official way. I have a site that currently uses onfocus / onblur to turn on background scrolling for the grey ominous

Thank you I was wondering if there was an official way. I have a site that currently uses onfocus / onblur to turn on background scrolling for the grey ominous clouds. (http://www.residentevilradio.com http://www.residentevilradio.com) Wouldn't that work as well for video? The scrolling doesn't start until the page is in focus and pauses the scrolling when you navigate away. (constantly scrolling an image is apparently still a bit processor intensive). That and a lot of us browse with 40+ tabs open.