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  • div滚动到页面顶端后固定住

    <!DOCTYPE HTML>
    <html>
    <head>
    <meta charset="UTF-8">
    <title>滚动至顶部后固定</title>
    <style type="text/css">
    .wrapper{width:1000px;height:2000px;margin-left:auto;margin-right:auto;}
    .header{height:150px;}
    #nav_keleyi_com{padding:10px;position:relative;top:0;background:#125430;width:1000px;}
    a{display:inline-block;margin:0 10px;*display:inline;zoom:1;color:white;}
    </style>
    </head>
    <body>
    <div class="wrapper">
    <div class="header"></div>
    <div id="nav_keleyi_com">
    <a href="http://keleyi.com/menu/net/" target="_blank">.NET</a>
    <a href="http://keleyi.com/menu/javascript/" target="_blank">Javascript</a>
    <a href="http://keleyi.com/menu/jquery/" target="_blank">jQuery</a>
    <a href="http://keleyi.com/menu/csharp/" target="_blank">C#</a>
    <a href="http://keleyi.com/menu/other/" target="_blank">其他</a>
    <a href="http://keleyi.com/" target="_blank">首页</a><a href="/menu/aspnet/" 
    
    target="_blank">ASP.NET</a> <a href="/menu/mvc/" target="_blank">MVC</a></div>
    </div>
    <script type="text/javascript" >
    function menuFixed(id){
    var obj = document.getElementById(id);
    var _getHeight = obj.offsetTop;
    
    window.onscroll = function(){
    changePos(id,_getHeight);
    }
    }
    function changePos(id,height){
    var obj = document.getElementById(id);
    var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
    if(scrollTop < height){
    obj.style.position = 'relative';
    }else{
    obj.style.position = 'fixed';
    }
    }
    </script>
    <script type="text/javascript">
    window.onload = function(){
    menuFixed('nav_keleyi_com');
    }
    </script>
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/shenyixin/p/3951193.html
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