自己做一款不错的二级导航菜单

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<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>多级导航菜单</title> 
<style> 
/* ::::: css ::::: */ 
strong { 
font-style: normal; 
font-weight: normal; 
font-weight: bold; 
} 
a { 
cursor: pointer; 
text-decoration: none; 
} 
#container { 
width: 960px; 
margin: 0pt auto; 
} 
#nav, .nav-container, .nav-container ul, #nav .nav-master-a:hover, #nav .nav-master-a:hover strong, #nav li.current .nav-master-a strong, #nav li.current .nav-master-a, #nav .nav-sub a:hover, #nav .nav-sub a:hover span { 
background-image: url('/upload/201011/20101103170026176.gif'); 
background-repeat: no-repeat; 
} 
#nav { 
position: relative; 
height: 66px; 
margin: 5px 0pt 0pt; 
background-position: 0pt -230px; 
background-repeat: repeat-x; 
} 
.nav-container { 
padding-left: 15px; 
height: 66px; 
background-position: 0pt 0pt; 
} 
.nav-container ul { 
height: 100%; 
background-position: right -66px; 
} 
.nav-container ul ul.nav-sub { 
background: none repeat scroll 0% 0% transparent; 
height: auto; 
} 
.nav-master { 
display: block; 
float: left; 
height: 36px; 
width: 100px; 
line-height: 36px; 
text-align: center; 
padding-right: 4px; 
} 
.nav-master-a { 
display: block; 
font-size: 14px; 
height: 26px; 
line-height: 26px; 
overflow: hidden; 
background: none repeat scroll 0% 0% transparent; 
text-decoration: none; 
margin-top: 5px; 
} 
.nav-master-a strong { 
display: block; 
color: rgb(255, 255, 255); 
height: 100%; 
} 
li.current .nav-master-a strong, #nav li.current .nav-master-a:hover strong { 
color: rgb(0, 0, 0); 
} 
.nav-master-a:hover { 
text-decoration: none; 
background-position: 0pt -315px; 
} 
.nav-master-a:hover strong { 
background-position: right -360px; 
} 
#nav li.current .nav-master-a strong { 
background-position: right -180px; 
padding-top: 2px; 
} 
#nav li.current .nav-master-a { 
background-position: 0pt -131px; 
overflow: hidden; 
color: rgb(0, 0, 0); 
height: 31px; 
} 
#nav li.current .nav-master-a:hover strong { 
color: rgb(0, 0, 0); 
} 
ul.nav-sub { 
position: absolute; 
width: 920px; 
text-align: left; 
top: 38px; 
left: 20px; 
display: none; 
padding: 2px 0pt 0pt; 
background: none repeat scroll 0% 0% transparent; 
} 
#nav .current .nav-sub { 
display: block; 
} 
.nav-sub li { 
float: left; 
display: block; 
width: 78px; 
text-align: center; 
height: 30px; 
overflow: hidden; 
margin-right: 4px; 
} 
#nav .nav-sub a { 
display: block; 
height: 22px; 
overflow: hidden; 
color: rgb(77, 77, 77); 
text-decoration: none; 
} 
#nav .nav-sub a span { 
display: block; 
line-height: 22px; 
height: 22px; 
} 
#nav .nav-sub a:hover { 
background-position: 0pt -405px; 
} 
#nav .nav-sub a:hover span { 
background-position: right -446px; 
} 
.sp-nav { 
overflow:hidden; 
background: url(/upload/201011/20101103170026176.gif) repeat-x 0 -595px; 
height:31px; 
line-height:31px 
} 
.sp-con { 
color:#CCC; 
margin:0 auto; 
width:968px; 
} 
.sp-l { 
overflow:hidden; 
float:left; 
background:url(/upload/201011/20101103170026176.gif) no-repeat 0 -558px; 
width:6px; 
height:31px 
} 
.sp-r { 
overflow:hidden; 
float:right; 
background:url(/upload/201011/20101103170026176.gif) no-repeat -6px -558px; 
height:31px; 
width:6px; 
} 
.sp-m { 
position:relative; 
padding:0 10px; 
float:left; 
background:url(/upload/201011/20101103170026176.gif) repeat-x 0 -495px; 
height:31px; 
line-height:31px; 
width:936px; 
color:#000; 
text-align: left; 
} 
.other { 
float: left; 
height: 23px; 
margin-right: 22px; 
display: inline; 
} 
.so { 
float: right; 
padding-top: 6px; 
height: 26px; 
} 
.so .inputstyleso { 
width: 89px; 
height: 16px; 
line-height: 16px; 
border: 1px solid rgb(190, 190, 190); 
float: left; 
padding-top: 2px; 
padding-left: 5px; 
} 
.so img { 
float: left; 
margin: 2px 4px 0pt 0pt; 
display: inline; 
} 
</style> 
</head> 
<body> 
<script language="javascript"> 
var waitInterval2; 
var MDelayTime2=300;/* 设置延时0.3秒 */ 
function qiehuan(num){ 
clearTimeout(waitInterval2); 
waitInterval2=window.setTimeout("qiehuan2("+num+");",MDelayTime2); 
} 
function qiehuan2(num){ 
clearTimeout(waitInterval2); 
for(var id = 0;id<=9;id++) 
{ 
if(id==num) 
{ 
document.getElementById("qh_con"+id).style.display="block"; 
document.getElementById("mynav"+id).className="nav-master current"; 
} 
else 
{ 
document.getElementById("qh_con"+id).style.display="none"; 
document.getElementById("mynav"+id).className="nav-master"; 
} 
} 
} 
</script> 
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