er1chu

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<!--     If jQuery object returns an error (e.g. blocked in Google CDN blocked in China) fallback to this CDN -->
<script> window.jQuery || document.write('<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"><\/script>');</script>