<!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=gb2312" /><script language=javascript src="http://www.0551jia.cn/js/jquery1.42.min.js"></script><title>测试</title><style type="text/css">* {color:#fff;}.clear { clear:both; height:0; line-height:0px; font-size:0;}#ding{position:fixed;z-index:100; background-color:#036; top:0;left:0;_position:absolute;_top:expression(documentElement.scrollTop + 0 + "px");_left:expression(documentElement.scrollLeft + 0 + "px");} #ding{width:100%;overflow:hidden; height:56px; text-align:center}.logo { background-color:#eee; height:70px; border-bottom:#d8d8d8 1px solid; margin-bottom:3px;}.navbox{ width:1100px; margin:0 auto; z-index:998;}.navboxfix{ position:fixed; left:50%; margin-left:-550px; width:1100px;top:56px; _position:relative;}.navbox {height:36px; line-height:36px; background-color:#484441; color:#FFF}.navbox dd a{display:block;width:134px; float:left; text-align:center; color:#fff}.k {height:800px; background-color:#069;}.b {height:800px; background-color:#393}</style></head><body><div id="ding"> 固定的顶 </div><div class="clear" style="height:56px;"></div><div class="logo wk cent"> 中间</div><div class="navbox"> <dl style="position:inherit"> <dd><a href="#kk1">这是1</a></dd> <dd><a href="#kk2">这是2</a></dd> <dd><a href="#kk3">这是3</a></dd> <dd><a href="#kk4">这是4</a></dd> <dd><a href="#kk5">这是5</a></dd> </dl></div><div class="k"><a name="kk1" id="kk1"></a>这是一</div><div class="b"><a name="kk2" id="kk2"></a>这是二</div><div class="k"><a name="kk3" id="kk3"></a>这是三</div><div class="b"><a name="kk4" id="kk4"></a>这是四</div><div class="k"><a name="kk5" id="kk5"></a>这是五</div><script type="text/javascript">var sft=$(".navbox").offset().top-56; //顶部固定DIV function shownav(){ var s_t= document.documentElement.scrollTop || document.body.scrollTop; if(s_t>sft){ $(".navbox").addClass("navboxfix") } else{ $(".navbox").removeClass("navboxfix") } }window.onscroll=shownav;</script></body></html>
参考:
offsetting an html anchor to adjust for fixed header
JQuery Position:Fixed 'NAVBAR' by scrolling the page
给锚点加上个下面的样式，纯css实现。
a.anchor{ display: block; position: relative; top: -92px; visibility: hidden;}存贴备用， 实际效果地址
非常感谢您的热情回复！！！
参考:
offsetting an html anchor to adjust for fixed header
JQuery Position:Fixed 'NAVBAR' by scrolling the page
给锚点加上个下面的样式，纯css实现。
a.anchor{ display: block; position: relative; top: -92px; visibility: hidden;}
