Is there any way to quickly determine if a browser supports CORS-enabled images not tainting the browser?

Question

Is there a quick test to determine if a browser supports CORS-enabled images not tainting a canvas when drawn on them. I know Chrome 15 supports this, Firefox 9Beta but not Firefox 8, Safari doesn't, IE9 doesn't. But there must be a pretty simple test to determine this, is basically drawing on a canvas with an image and seeing if you get an exception when you try to get image data, or is there any other easy way to determine this.

Answer 1

This seems to work:

if ('crossOrigin' in new Image())
    // ...