代码如下: <!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" /><title>无标题文档</title><style type="text/css">...#zgkyy {...}{ width: 500px; padding-top: 5px; padding-right: 20px; padding-bottom: 5px; padding-left: 10px; float: left; color: #02700A;}/**//*利用padding:20px 20px 0 0来固定菜单位置*/#zgkyy ul {...}{ float:left; list-style:none; margin:5px; width: 500px; padding: 5px; height: 40px;}/**//*添加了float:right使得菜单位于页面右侧*/#zgkyy ul li {...}{ float:left; margin:0 3px; display:block; line-height:12px; color: #02700A; font-size: 12px;}#nrzx0{...}{ float:left; width:699px; height:50px; line-height: 20px; text-decoration: none; font-size: 12px; line-height: 20px; color: #000000; margin: 5px; display:inline;}</style><SCRIPT language=javascript type=text/javascript>...var currentId = 1;var divtop=...{0:"divtop1",1:"divtop2",2:"divtop3",3:"divtop4"}var divct=...{0:"divct1",1:"divct2",2:"divct3",3:"divct4"}function changebg(i,id)...{ //document.getElementById(divtop[i]+currentId).classname=""; 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