<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>仿新浪网“返回顶部”效果</title> <meta http-equiv="content-type" content="text/html;charset=gb2312"> <style type="text/css"> .backToTop { display: none; width: 18px; line-height: 1.2; padding: 5px 0; background-color: #000; color: #fff; font-size: 12px; text-align: center; position: fixed; _position: absolute; right: 10px; bottom: 100px; _bottom: "auto"; cursor: pointer; opacity: .6; filter: Alpha(opacity=60); } </style> <script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.2.min.js"></script> </head> <body> <div style="height:2000px;"></div> <script type="text/javascript"> (function() { var $backToTopTxt = "返回顶部", $backToTopEle = $('<div class="backToTop"></div>').appendTo($("body")) .text($backToTopTxt).attr("title", $backToTopTxt).click(function() { $("html, body").animate({ scrollTop: 0 }, 120); }), $backToTopFun = function() { var st = $(document).scrollTop(), winh = $(window).height(); (st > 0)? $backToTopEle.show(): $backToTopEle.hide(); //IE6下的定位 if (!window.XMLHttpRequest) { $backToTopEle.css("top", st + winh - 166); } }; $(window).bind("scroll", $backToTopFun); $(function() { $backToTopFun(); }); })(); </script> </body> </html>