IE 10 see Youku video off light function failure solution

                  Youku video off function (mouse stays at the right end of the playback window), this is not the same as simply brightening the dark, darkening the web page itself, not the video part, a small and practical function. Basically, when you turn off the lights, the entire page turns black, just like in a movie theater.
In Win8 IE10 inside Youku video off the light this function has actually failed, it seems that some websites still check the compatibility of IE10. Solve IE10 to see Youku video can not turn off the lights: press F12, browser mode to select IE9.