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  • 返回头部的小火箭

    <!DOCTYPE html>
    <html>
    <head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
    body {
    2000px;
    }
    .top{
    position: fixed;
    right:50px;
    bottom:100px;
    display: none;
    }

    </style>
     
     
    </head>
    <body>
    <div id="gotop" class="top">
    <img src="images/Top.jpg" alt=""/>
    </div>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    <p>天王盖地虎,小鸡炖蘑菇</p>
    </body>
    </html>
    <script type="text/javascript">
    var oGotop = document.getElementById("gotop");
    window.onscroll = function(){
      var h = document.documentElement.scrollTop || document.body.scrollTop;
      var y = 100;
      if( h>y ){
         oGotop.style.display = "block";
         oGotop.onclick = function(){
             document.documentElement.scrollTop = 0; 
             oGotop.style.display = "none";  
         }
      }
    }
    </script>
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  • 原文地址:https://www.cnblogs.com/tis100204/p/10328774.html
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