<div id="fb-root"></div>
<script>
    window.fbAsyncInit = function() {
    console.log('got here');
    FB.init({
    appId      : '197112467099018',// App ID
    channelUrl : '//WWW.MYDOMAIN.COM/channel.html',// Channel File
    status     : true,// check login status
    cookie     : true,// enable cookies to allow the server to access the session
    xfbml      : true  // parse XFBML
   });
 
   // Additional initialization code here
 
   };
 
   // Load the SDK Asynchronously
   (function(d){
    var js,id = 'facebook-jssdk',ref = d.getElementsByTagName('script')[0];
    if (d.getElementById(id)) {return;}
    js = d.createElement('script'); js.id = id; js.async = true;
    js.src = "//connect.facebook.net/en_US/all.js";
    ref.parentNode.insertBefore(js,ref);
   }(document));
 </script>

Chrome的控制台告诉我脚本无法加载(GET失败),带有标记为(匿名函数)的2个错误

它指出的错误是：

ref.parentNode.insertBefore(js,ref);
   }(document));

谁能帮我弄清楚这些线路有什么问题？