HTML5 Video Javascript

I am not experienced in Javascript, I have the following script to play video files on Andriod phone, and it works fine.

 <scr开发者_如何转开发ipt type="text/javascript">
        function PlayMyVideo(arg) {
            var myVideo = document.getElementById([arg]);
            myVideo.play();
        }
    </script>
<video id="what" src="what.mp4" poster="" />
<input type="button" onclick="PlayMyVideo('what')" value="Play" />

I am trying to write the tag on the fly:

  <script type="text/javascript">
        function PlayVideo() {
            new_video = document.createElement('video');
            new_video.setAttribute('scr', 'what.mp4'); 
            new_video.play(); 
         }
    </script>
<input type="button" onclick="PlayVideo()" value="Play2" />

Nothing happen, would appreciate your suggestions. Thanks in advance

---

new_video.setAttribute('scr', 'what.mp4');

'scr' is misspelled. It should be 'src'.

and also you should wait for the movie to load before play

---

Well you're not appending the newly created tag to anything, so it can't play because it's in "memory"/"void", not on the screen.

<div id='plc'>&nbsp;</div>

<script type='text/javascript'>
function PlayVideo() {
new_video = document.createElement('video');
document.getElementById('plc').appendChild(new_video);
new_video.setAttribute('scr', 'what.mp4');
new_video.play();
}

---

you are creating the video element, you need to add it to the DOM before it will be visible, more info here: http://www.javascriptkit.com/javatutors/dom2.shtml