html5 video使用，怎样截取正在播放的时间

http://www.w3school.com.cn/tags/html_ref_audio_video_dom.asp

http://blog.1wanweb.com/post/Html5-Video.aspx

<!DOCTYPE html>
<html> <head>

<title>Simple JavaScript Controller</title>
<script src="jquery-1.4.2.min.js"></script>
<script>

function init() {
    document.video = document.getElementByIdx_x("video");
    webm = document.getElementByIdx_x("webm");
    init_events();
   // init_properties();
    //setInterval(update_properties, 1000);
}
function init_events(){
if(true) { //监听video的各个属性
    document.video.addEventListener();
    }
}

       </script>
       <script>

            var beginTime="";
      var endTime="";
           function record(){
                  Media = document.video = document.getElementByIdx_x("video");
                   beginTime = Media.currentTime;
                  $("#label1").html('<a href="javascript:stop();">停止</a>');
               alert(beginTime);

               }
           function stop(){

               endTime = Media.currentTime;
               alert(endTime);
               $("#label1").html('<label>开始记录时间</label><input id="begin" type="text" value='+beginTime+'></input><label value="结束记录时间"/> <label>结束记录时间</label><input id="stop" type="text" value='+endTime+'></input><button type="button" onclick="send()">上传</button>');
               }

   </script>
       function send(){





       }


              </head>
                     <body > <div class="video-player" align="center">

   <video controls="controls" id="video" >
<source src="movie.ogg" type="video/ogg">
<source src="战争背后.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>

                        <br><div id="label1"> <a href="javascript:record();">记录</a> </div>

              <br> </div>
              </body>
              </html>

事例2：

<!DOCTYPE html>
<html>
<body>

<button onclick="hasVidEnded()" type="button">该视频播放是否已结束？</button>
<div id="time"></div>
<br />
<br />
<video id="video1" controls="controls">
<source src="/example/html5/mov_bbb.mp4" type="video/mp4">
<source src="/example/html5/mov_bbb.ogg" type="video/ogg">
Your browser does not support HTML5 video.
</video>

<script>
myVid=document.getElementById("video1");
setInterval(function(){
   if(myVid){
        document.getElementById("time").innerHTML=myVid.currentTime;
        if(myVid.currentTime>3){
              myVid.pause();// 3秒后暂停

         }
    }
},1000);
function hasVidEnded()
{

alert(myVid.ended);
}
</script>

</body>
</html>

示例3：

<!DOCTYPE html>
 
<html>
 
  <head>
 
    <title>Simple JavaScript Controller</title>
 
    <script type="text/javascript">
 
       function playPause() {
 
       var myVideo = document.getElementsByTagName('video')[0];
 
       if (myVideo.paused)
 
           myVideo.play();
 
       else
 
           myVideo.pause();
 
       }
 
       function makeBig() {
 
       var myVideo = document.getElementsByTagName('video')[0];
 
       myVideo.height = (myVideo.videoHeight * 2 ) ;
 
       }
 
       function makeNormal() {
 
       var myVideo = document.getElementsByTagName('video')[0];
 
       myVideo.height = (myVideo.videoHeight) ;
 
       }
 
    </script>
 
  </head>
 
  <body>
 
     <div class="video-player" align="center">
 
      <video src="myMovie.m4v" poster="poster.jpg" ></video>
 
      <br>
 
      <a href="javascript:playPause();">Play/Pause</a> <br>
 
      <a href="javascript:makeBig();">2x Size</a> |
 
      <a href="javascript:makeNormal();">1x Size</a> <br>
 
     </div>
 
  </body>
 
</html>

html5 video使用，怎样截取正在播放的时间

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