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  <script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
  <script src="js/snow.js"></script>

  <style type="text/css">
    .snow-container {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 100001;
      background: url(image/gg.jpg) center top no-repeat;
      background-size: 100% auto;
    }
  </style>
</head>

<body>
<div class="snow-container">