51工具盒子本文实例讲述了js实现的黑背景灰色二级导航菜单效果代码。分享给大家供大家参考。具体如下：
这是一款js实现的黑背景灰色二级导航菜单，兼容IE6、firefox的js+css横向二极导航菜单。挺简洁，不过很清新，二级菜单是水平显示在主菜单的下方，采用流行的微软雅黑字体，若不想用这种字体，可换成默认的宋体即可。
运行效果截图如下：
在线演示地址如下：
http://demo.jb51.net/js/2015/js-black-bgcolor-2level-nav-style-codes/
具体代码如下：
<!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">
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312">
<TITLE>兼容IE6、firefox的灰色横向二极导航菜单代码</TITLE>
<style type=text/css>
BODY { background:#26272b;}
a{ color:#FFFFFF}
UL {LIST-STYLE-TYPE: none;padding:0px;margin:0px;}
LI {FONT-SIZE: 12px; COLOR: #333; LINE-HEIGHT: 1.5em; FONT-FAMILY: "微软雅黑", Arial, Verdana;}
.hide {DISPLAY: none}
#mainmenu_top{width:980px; margin:0 auto;BACKGROUND: url('images/nav_bg.gif') bottom repeat-x;HEIGHT: 40px; }
#mainmenu_top UL{}
#mainmenu_top UL LI {FLOAT: left;}
#mainmenu_top UL LI A {WIDTH: 100px;CURSOR: pointer;line-HEIGHT:32px;padding:6px 0 2px;text-decoration: none;DISPLAY: block;COLOR: #fff;TEXT-ALIGN: center; FONT-WEIGHT: bold;}
#mainmenu_top .menu-lft {padding-left:10px;background:url('images/nav_l.gif') no-repeat left bottom;height:40px;}
#mainmenu_top .menu-rht {background:url('images/nav_r.gif') no-repeat right bottom;height:40px;}
#mainmenu_top UL LI .menuhover {BACKGROUND: url('images/nav_hover.gif') bottom repeat-x; COLOR: #000;}
#mainmenu_top UL LI.home{BACKGROUND: url('images/nav_home.gif') center bottom no-repeat;}
#mainmenu_bottom {width:980px; margin:0 auto;height:32px;line-height:32px;display:block;overflow:hidden;BACKGROUND:#fff;}
#mainmenu_bottom UL LI { FLOAT: left; MARGIN-LEFT:12px;padding:0 12px;HEIGHT: 32px;}
#mainmenu_bottom UL LI A {COLOR: #313131; LINE-HEIGHT: 32px;PADDING-RIGHT: 18px;DISPLAY: block;text-decoration: none; background:url('images/line.gif') no-repeat right bottom;}
#mainmenu_bottom UL LI A:hover {text-decoration: underline;}
</style>
<SCRIPT type=text/javascript>
var waitting = 1;
var secondLeft = waitting;
var timer;
var sourceObj;
var number;
function getObject(objectId)//获取id的函数
{
if(document.getElementById && document.getElementById(objectId)) {
// W3C DOM
return document.getElementById(objectId);
} else if (document.all && document.all(objectId)) {
// MSIE 4 DOM
return document.all(objectId);
} else if (document.layers && document.layers[objectId]) {
// NN 4 DOM.. note: this won't find nested layers
return document.layers[objectId];
} else {
return false;
}
}
function SetTimer()//主导航时间延迟的函数
{
for(j=1; j <10; j++){
if (j == number){
if(getObject("mm"+j)!=false){
getObject("mm"+ number).className = "menuhover";
getObject("mb"+ number).className = "";
}
}
else{
if(getObject("mm"+j)!=false){
getObject("mm"+ j).className = "";
getObject("mb"+ j).className = "hide";
}
}
}
}
function CheckTime()//设置时间延迟后
{
secondLeft--;
if ( secondLeft == 0 )
{
clearInterval(timer);
SetTimer();
}
}
function showM(thisobj,Num)//主导航鼠标滑过函数,带时间延迟
{
number = Num;
sourceObj = thisobj;
secondLeft = 1;
timer = setTimeout('CheckTime()',100);
}
function OnMouseLeft()//主导航鼠标移出函数,清除时间函数
{
clearInterval(timer);
}
</SCRIPT>
<!--导航开始-->
<DIV id=mainmenu_body>
<!--主导航开始-->
<DIV id=mainmenu_top>
<div class="menu-lft"><div class="menu-rht">
<UL>
<LI class="home"><A id=mm1 onmouseover=showM(this,1); onmouseout=OnMouseLeft(); href="#" target=_parent>网站首页</A> </LI>
<LI><A id=mm2 onmouseover=showM(this,2); onmouseout=OnMouseLeft(); href="#" target=_parent>JS代码</A> </LI>
<LI><A id=mm3 onmouseover=showM(this,3); onmouseout=OnMouseLeft(); href="#" target=_parent>电子商务</A> </LI>
<LI><A id=mm4 onmouseover=showM(this,4); onmouseout=OnMouseLeft(); href="#" target=_parent>脚本下载</A> </LI>
<LI><A id=mm5 onmouseover=showM(this,5); onmouseout=OnMouseLeft(); href="#" target=_parent>建站技巧</A> </LI>
<LI><A id=mm6 onmouseover=showM(this,6); onmouseout=OnMouseLeft(); href="#" target=_parent>CSS技巧</A> </LI>
<LI><A id=mm7 onmouseover=showM(this,7); onmouseout=OnMouseLeft(); href="#" target=_parent>CSS导航菜单</A> </LI>
<LI><A id=mm8 onmouseover=showM(this,8); onmouseout=OnMouseLeft(); href="#" target=_parent>网络营销</A> </LI>
<LI><A id=mm9 onmouseover=showM(this,9); onmouseout=OnMouseLeft(); href="#" target=_parent>SEO优化</A> </LI></UL>
</DIV></DIV>
</DIV>
<!--子导航导航开始-->
<DIV id=mainmenu_bottom>
<UL class=hide id=mb1>
<LI><A href="#">2012年元旦网站推广惊喜促销价</A> </LI>
<LI><A href="#">网站公告：脚本之家7年了</A> </LI> </UL>
<UL class=hide id=mb2>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>网页特效</A> </LI></UL>
<UL class=hide id=mb3>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网页特效</A> </LI></UL>
<UL class=hide id=mb4>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>网页特效</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI></UL>
<UL class=hide id=mb5>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>服务器租用首页</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>超级机房</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI></UL>
<UL class=hide id=mb6>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本下载</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI></UL>
<UL class=hide id=mb7>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>个人建站</A> </LI>
<LI><A href="#" target=_parent>门户建站</A> </LI></UL>
<UL class=hide id=mb8 style="DISPLAY: none">
<LI><A href="#" target=_parent>脚本之家</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI></UL>
<UL class=hide id=mb9>
<LI><A href="#">脚本之家</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网页特效</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI>
<LI><A href="#" target=_parent>网络营销</A> </LI></UL>
<script>
function mmenuURL()//主导航、二级导航显示函数
{
var thisURL = document.URL;
tmpUPage = thisURL.split( "/" );
thisUPage_s = tmpUPage[ tmpUPage.length-2 ];
thisUPage_s= thisUPage_s.toLowerCase();//小写
//thisUPage=thisUPage.substring(0,4)
if(thisUPage_s=="test.hichina.com"||thisUPage_s=="www.net.cn"||thisUPage_s=="www.hichina.com")
{
getObject("mm1").className="menuhover"
getObject("mb1").className = "";
}
else if(thisUPage_s=="domain")
{
getObject("mm2").className="menuhover"
getObject("mb2").className = "";
}
else if(thisUPage_s=="hosting")
{
getObject("mm3").className="menuhover"
getObject("mb3").className = "";
}
else if(thisUPage_s=="mail")
{
getObject("mm4").className="menuhover"
getObject("mb4").className = "";
}
else if(thisUPage_s=="solutions"||thisUPage_s=="site"){
getObject("mm5").className="menuhover"
getObject("mb5").className = "";
}
else if(thisUPage_s=="promotion"){
getObject("mm6").className="menuhover"
getObject("mb6").className = "";
}
else if(thisUPage_s=="trade"||thisUPage_s=="phonetic"||thisUPage_s=="switchboard"||thisUPage_s=="note"){
getObject("mm7").className="menuhover"
getObject("mb7").className = "";
}
else if(thisUPage_s=="benefit"){
getObject("mm8").className="menuhover"
getObject("mb8").className = "";
}
else if(thisUPage_s=="userlogon"||thisUPage_s=="domain_service"||thisUPage_s=="hosting_service"||thisUPage_s=="mail_service"||thisUPage_s=="Payed"||thisUPage_s=="unPayed"||thisUPage_s=="Invoice"||thisUPage_s=="Finance"||thisUPage_s=="RegInfoModify"){
getObject("mm9").className="menuhover"
getObject("mb9").className = "";
}
else
{
getObject("mm1").className="";
getObject("mb1").className = "";
}
}
window.load=mmenuURL()
</script>
</DIV>
</DIV>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。
