滚动页面时DIV到顶部时fixed(原生js实现)

来源：互联网发布：分类信息网软件编辑：程序博客网时间：2024/06/11 08:39
<!DOCTYPE HTML><html><head><meta charset="UTF-8"><title>菜单滚动至顶部后固定-柯乐义</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>
0 0