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效果简介:滚到那个栏目 一个fixed元素的栏目名就变色。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <style> html{ height: 2000px; } ul li{ width:100%; height:200px; margin-bottom:100px; background:#333; color:#fff; } .active{display:block;width:150px;height:28px;color: red;background: #ff00ff;} </style> <script src="http://code.jquery.com/jquery-1.7.2.min.js"></script> </head> <body> <div style="position:fixed;top:50%;left:20%;"> <a href="#aaa" data-top="-216">11121</a> <a href="#bbb" data-top="-216">11121</a> <a href="#ccc" data-top="-216">11121</a> <a href="#ddd" data-top="-216">11121</a> <a href="#eee" data-top="-216">11121</a> </div> <ul> <li id="aaa">111111</li> <li id="bbb">222222</li> <li id="ccc">33333</li> <li id="ddd">44444</li> <li id="eee">55555</li> </ul> <script> var oli=document.getElementsByTagName("li"); var oa=document.getElementsByTagName("a"); var arr=[]; window.onscroll=function(){ scrolltop(200,100); } function scrolltop(height,values){ for (var i = 0; i < oli.length; i++) { if(oli[i].getBoundingClientRect().top>-(height+values)&&oli[i].getBoundingClientRect().top<=0){ oa[i].className="active"; }else{ oa[i].className=""; } } } </script> </body> </html>
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原文地址:http://blog.csdn.net/u011551941/article/details/45149813