未捕获的TypeError javascript与flash通信

Question

我想通过javascript与flash通信，来控制我的flash播放器这里是我的代码，但我有一个错误，你能帮我吗？

    var flashvars = {
        flvpVideoSource: "myApp.swf",
        flvpWidth: "640",
        flvpHeight: "360"
    };
    var params = {
        menu: "true",
        allowfullscreen: "true"
    };
    var attributes = {
        id: "FLVplayer",
        name: "FLVplayer"
    };


    //functions used to find the id of the flash object
    function getFlashMovieObject(movieName){
        if(document.embeds[movieName])
        return document.embeds[movieName];
        if(window.document[movieName])
        return window.document[movieName];
        if(window[movieName])
        return window[movieName];
        if(document[movieName])
        return document[movieName];
        return null;
    }

    //function in flash to play the video
    function playMyVideoInFlash(){
        var flashMovie = getFlashMovieObject("FLVplayer");
        flashMovie.playMyVideo();
    }

    //function in flash to pause the video
    function pauseMyVideoInFlash(){
        var flashMovie = getFlashMovieObject("FLVplayer");
        flashMovie.pauseMyVideo();
    }
    </script>

这是我的错误：

 Uncaught TypeError: Cannot call method 'playMyVideo' of null index.html:37
playMyVideoInFlash index.html:37
onclick

我的按钮代码：

 <button type="button"  onclick="playMyVideoInFlash()">play</button>
    <button type="button" onclick="pauseMyVideoInFlash()">pause</button>

提前感谢

Answer 1

使用大括号，它应该可以工作(或者写在一行中！)，javascript会自动在每行后面插入一个分号！

带大括号的：

function getFlashMovieObject(movieName){
    if(document.embeds[movieName]) {
      return document.embeds[movieName];
    }
    if(window.document[movieName]) {
      return window.document[movieName];
    }
    if(window[movieName]) {
      return window[movieName];
    }
    if(document[movieName]) {
      return document[movieName];
    }
    return null;
}

一行：

function getFlashMovieObject(movieName){
    if(document.embeds[movieName]) return document.embeds[movieName];
    if(window.document[movieName]) return window.document[movieName];
    if(window[movieName]) return window[movieName];
    if(document[movieName]) return document[movieName];
    return null;
}

您还应该检查函数中的NULL (可能还有playMyVideo/stopMyVideo-function是否存在)，因为您在getFlashMovieObject-Function中返回了它：

 function playMyVideoInFlash(){
    var flashMovie = getFlashMovieObject("FLVplayer");
    if(typeof flashMovie === 'object' && typeof flashMovie.playMyVideo === 'function') {
      flashMovie.playMyVideo();
    }
}