检测浏览器是否支持HTML5视频

function checkVideo(){if(!!document.createElement('video').canPlayType){var vidTest=document.createElement("video");oggTest=vidTest.canPlayType('video/ogg; codecs="theora, vorbis"');if (!oggTest){h264Test=vidTest.canPlayType('video/mp4; codecs="avc1.42E01E, mp4a.40.2"');if (!h264Test){document.getElementById("checkVideoResult").innerHTML="Sorry. No video support."}else{if (h264Test=="probably"){document.getElementById("checkVideoResult").innerHTML="Yes! Full support!";}else{document.getElementById("checkVideoResult").innerHTML="Well. Some support.";}}}else{if (oggTest=="probably"){document.getElementById("checkVideoResult").innerHTML="Yes! Full support!";}else{document.getElementById("checkVideoResult").innerHTML="Well. Some support.";}}}else{document.getElementById("checkVideoResult").innerHTML="Sorry. No video support."}}