html：在全屏模式下播放视频，在后退时暂停播放（退出全屏模式）

Question

我使用下面的代码来播放视频 请参阅详情链接：http://liveweave.com/gaDcmn

    var v = document.getElementById("myVideo"); 

    $(document).on('click', v, function (e) {
        if (v.paused === false) {
            v.pause();
        } else {
            v.webkitEnterFullscreen();
            v.play();
        }

        return false;
    });

<video width="80%" height="auto" controls="controls" id="myVideo">
                <source src="video/kitkat_converted.mp4" type="video/mp4" />
            </video>

现在 我可以在我的brwoser中播放暂停vidoe，但我在android浏览器中遇到了问题：

 1. 1:i want that when we click play button it plays in fullscreen mode 
    but when i click again it does not gets paused

 2: Problem in both android When i backpress   fullscreen video in android  or browser exitfullscreen video

Video must get paused but it keeps on playing , what to do to pause video when not in fullscreen mode

该怎么做