Flex中如何利用videoPlayer属性和mx_internal命名空间，清除VideoDisplay控件内容

main.mxml

1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"
3. layout="vertical">
5. <mx:VideoDisplayid="videoDisplay"
6. source="http://www.helpexamples.com/flash/video/cuepoints.flv"/>
8. <mx:Buttonlabel="pause"
9. click="videoDisplay.pause();"/>
10. <mx:Buttonlabel="clear"
11. click="videoDisplay.mx_internal::videoPlayer.clear();"/>
13. </mx:Application>