XMLHttpRequest，使用多个1不起作用，只是第一个.需要使用多个

您应该清理代码，这样您就可以在每个想要获取值的地方调用一个函数。你可以在html的头部分有一个脚本，里面有一个类似于的函数

getMovieData( moveID, titleID, runtimeID, plotID ) {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (xhttp.readyState == 4 && xhttp.status == 200) {
       var fullMovie = JSON.parse(xhttp.responseText)
       var movie = { title: fullMovie.Title, runtime: fullMovie.Runtime, plot: fullMovie.Plot,};
       document.getElementById(titleID).innerText = movie.title;
       document.getElementById(runtimeID).innerText = movie.runtime;
       document.getElementById(plotID).innerText = movie.plot;
    }
  };
  xhttp.open("GET", "http://www.omdbapi.com/?i=" . movieID . "&plot=short&r=json", true);
  xhttp.send();
}

然后在你的每个标签中调用它。它更干净，可以更好地扩展，应该可以消除你的bug。

好的，他们现在都工作了。我把它们都做成IIFE（立即调用函数表达式）。请参阅本·阿尔曼的文章。

(function() {
  xHR();
  function xHR() {
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
      if (xhttp.readyState == 4 && xhttp.status == 200) {
        var fullMovie = JSON.parse(xhttp.responseText)
        var movie = {
          title: fullMovie.Title,
          runtime: fullMovie.Runtime,
          plot: fullMovie.Plot,
        };
        document.getElementById('Title1').innerText = movie.title;
        document.getElementById('Runtime1').innerText = movie.runtime;
        document.getElementById('Plot1').innerText = movie.plot;
        xHR();
      }
    };
    xhttp.open("GET", "http://www.omdbapi.com/?i=tt3322364&plot=short&r=json", true);
    xhttp.send();
  }
})();
(function() {
  xHR2();
  function xHR2() {
    var xhttp2 = new XMLHttpRequest();
    xhttp2.onreadystatechange = function() {
      if (xhttp2.readyState == 4 && xhttp2.status == 200) {
        var fullMovie2 = JSON.parse(xhttp2.responseText)
        var movie2 = {
          title2: fullMovie2.Title,
          runtime2: fullMovie2.Runtime,
          plot2: fullMovie2.Plot,
        };
        document.getElementById('Title2').innerText = movie2.title2;
        document.getElementById('Runtime2').innerText = movie2.runtime2;
        document.getElementById('Plot2').innerText = movie2.plot2;
        xHR2();
      }
    }
    xhttp2.open("GET", "http://www.omdbapi.com/?i=tt1528854&plot=short&r=json", false);
    xhttp2.send();
  }
})();

<label for="img1" class="container1">
  <div>
    <input id="img1" type="radio" name="img-descr">
    <div>
      <p id="Title1"></p>
      <p id="Runtime1"></p>
      <p id="Plot1"></p>
    </div>
  </div>
</label>
<label for="img2">
  <div>
    <input id="img2" type="radio" name="img-descr" class="container1">
    <div>
      <p id="Title2">Title2</p>
      <p id="Runtime2">Title2</p>
      <p id="Plot2"></p>
    </div>
  </div>
</label>
<script src="http://gh-canon.github.io/stack-snippet-console/console.min.js"></script>

出现了一些错误。

• 在最后一个</script>标记的正上方有一个错误的"｝"
• 有几个变量标签错误最重要的是
• xhttp变量相互碰撞

bitfiddler说得对，您应该将脚本提取到一个单独的文件中。

忽略html，这里是基于您的代码的工作代码，它修复了上面列出的项目：

                            <p id="Title1"></p>
                            <p id="Runtime1"></p>
                            <p id="Plot1"></p>
                            <script>
                                var xhttp1 = new XMLHttpRequest();
                                xhttp1.onreadystatechange = function() {
                                    if (xhttp1.readyState == 4 && xhttp1.status == 200) {
                                        var fullMovie1 = JSON.parse(xhttp1.responseText)
                                        var movie1 = { title1: fullMovie1.Title, runtime1: fullMovie1.Runtime, plot1: fullMovie1.Plot};
                                        document.getElementById('Title1').innerText = movie1.title1;
                                        document.getElementById('Runtime1').innerText = movie1.runtime1;
                                        document.getElementById('Plot1').innerText = movie1.plot1;
                                    }
                                };
                                xhttp1.open("GET", "http://www.omdbapi.com/?i=tt3322364&plot=short&r=json", true);
                                xhttp1.send();
                            </script>
                            <p id="Title2"></p>
                            <p id="Runtime2"></p>
                            <p id="Plot2"></p>
                            <script>
                                var xhttp2 = new XMLHttpRequest();
                                xhttp2.onreadystatechange = function() {
                                    if (xhttp2.readyState == 4 && xhttp2.status == 200) {
                                        var fullMovie2 = JSON.parse(xhttp2.responseText)
                                        var movie2 = { title2: fullMovie2.Title, runtime2: fullMovie2.Runtime, plot2: fullMovie2.Plot};
                                        document.getElementById('Title2').innerText = movie2.title2;
                                        document.getElementById('Runtime2').innerText = movie2.runtime2;
                                        document.getElementById('Plot2').innerText = movie2.plot2;
                                    }
                                };
                                xhttp2.open("GET", "http://www.omdbapi.com/?i=tt1528854&plot=short&r=json", true);
                                xhttp2.send();
                            </script>