JS实例之滚动固定效果，实现顶部菜单固定效果。

 1 <head>
 2 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 3 <title>无标题文档</title>
 4 <style type="text/css">
 5 *{margin:0px auto; padding:0px;}
 6 #tou{width:100%; height:200px; background-color:#06C;}
 7 #menu{width:100%; height:80px; background-color:#666;}
 8 #neirong{width:100%; height:2000px;}
 9 </style>
10 </head>
11 
12 <body>
13 <div id="tou"></div>
14 <div id="menu"></div>
15 <div id="neirong"></div>
16 </body>
17 <script type="text/javascript">
18 window.onscroll =function(){
19     if(window.scrollY>=200){
20         document.getElementById("menu").style.position="fixed";
21         document.getElementById("menu").style.top="0px";
22     }else{
23         document.getElementById("menu").style.position="";
24     }
25 }
26 </script>
27 </html>

posted on 2017-06-22 20:24 为伊消得阅读(247) 评论(0) 收藏举报