jQuery下的返回顶部功能的实现实例页面
CSS代码.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);}JS代码(function() { var $backToTopTxt = "返回顶部", $backToTopEle = $('<div ></div>').appendTo($("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."top", st + winh - 166); } }; $(window).bind("scroll", $backToTopFun); $(function() { $backToTopFun(); });})();TAG:
