<!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><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>fixedBox</title><script id="xcore" type="text/javascript" src="http://www.haiqiancun.com/xWidget-0.1/xcore.js"></script><style>*{margin:0px;padding:0px;} body{height:3000px;}</style><script>$(function() { $(".fixedBox").each(function() { var self = $(this); var id = self.attr("id") || 'fixedBox_' + Math.round(Math.random() * 100000); self.attr("id", id); var fb = $("#" + id); var mt = Math.floor(fb.css("margin-top").substring(2, 0)) || 0; var cd = $('<div style="height:' + fb.outerHeight() + 'px;display:none;' + fb.attr("style") + '"></div>'); fb.after(cd); fb.css({'z-index': 999}).data({'top': fb.offset().top,'left': fb.offset().left}); $(window).scroll(function() { var pt = fb.data('top'); var pl = fb.data('left'); var st = $(document).scrollTop() - 10; var h = $(document).height(); if (st > pt || st == pt) { cd.show(); if ((st + self.outerHeight()) > h) { self.css({position: 'fixed',top: (h - (st + self.outerHeight()))}); } else { self.css({position: 'fixed',top: 0 - mt}); } } else { cd.hide(); self.css({position: 'relative',top: 0}); } }) }) }) </script></span></head><body><div><div style="margin-top:50px; width:100%; overflow:hidden;background:#fff; font-size:12px;"><script> $(function(){ $(".fixedBox").each(function(){ var self= $(this); var id = self.attr("id")||'fixedBox_'+Math.round(Math.random()*100000);self.attr("id",id); var fb = $("#"+id); var mt = Math.floor(fb.css("margin-top").substring(2,0))||0;var cd = $('<divstyle")+'"></div>');fb.after(cd); fb.css({'z-index':999}).data({'top':fb.offset().top,'left':fb.offset().left});$(window).scroll(function(){ var pt = fb.data('top'); var pl = fb.data('left');var st = $(document).scrollTop()-10; var h = $(document).height(); if(st>pt||st==pt){cd.show(); if((st+self.outerHeight())>h){ self.css({position:'fixed',top:(h-(st+self.outerHeight()))});}else{ self.css({position:'fixed',top:0-mt}); } }else{ cd.hide(); self.css({position:'relative',top:0});} }) }) }) </script></div>例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例子例</div></body></html>