<li><a href="#gldl"><msg:out key="glgk.Geography"/></a></li>
<h4><a id="glls" class="link_fix"></a><i class="co1"></i><msg:out key="glgk.History"/></h4>
样式
#spynav.affix { top: 2px; } .affix { position: fixed; }
原文：http://www.cnblogs.com/ilooking/p/4866377.html