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Facebook 协议。 FB._https = (window.location.protocol == "https:"); FB._secure = (window.location.protocol == "https:"); <script type=",facebook,ssl,https,facebook-javascript-sdk,Facebook,Ssl,Https,Facebook Javascript Sdk,协议。 FB._https = (window.location.protocol == "https:"); FB._secure = (window.location.protocol == "https:"); <script type="text/javascript" src="https://connect.facebook.net/en_US/all.js"></script> <script type="text/javascript" src

协议。
FB._https = (window.location.protocol == "https:");
FB._secure = (window.location.protocol == "https:");
<script type="text/javascript" src="https://connect.facebook.net/en_US/all.js"></script>
<script type="text/javascript" src="//connect.facebook.net/en_US/all.js"></script>