HTML

在#topnanv加入一级导航菜单和二级下拉菜单切换内容#seledbox

<div id="topnanv" style="width: 980px;"> <div class="defu"> <a href="https://jy.tp.yuanmeng.life/js" target="_self">首页</a> </div> <div id="anvlfteb"> <div selec="bbs" class="posbox"> <a href="https://jy.tp.yuanmeng.life/js">新闻</a> <i></i></div> <div id="seledbox" class="posiabox" style="display: none; left: 1px;"><div> </div></div> </div> <div id="loginbtm"> <a style="color:#FFF" target="_blank" href="https://jy.tp.yuanmeng.life/js">免费发布信息</a> </div> </div>

jQuery

topnv.js定义.posbox标签 上的selec属性对应二级菜单json，并附带mouseover和mouseleave触发事件

$(function() {
    var $anvlfteb = $('#anvlfteb'),
            $posbox = $anvlfteb.find('div.posbox'),
            $seledbox = $("#seledbox"),
            anvjson = {
                bbs: '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico7.gif">抚州快讯</a>' +
                        '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico17.gif">国内新闻</a>' +
                        '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico3.gif">军事快讯</a>',
                news: '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico7.gif">抚州快讯</a>' +
                        '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico4.gif">抚州教育</a>',
                post: '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico7.gif">抚州快讯</a>' +
                        '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico4.gif">抚州教育</a>' +
                        '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico17.gif">国内新闻</a>' +
                        '<a href="https://jy.tp.yuanmeng.life/js"><img src="img/ico3.gif">军事快讯</a>',
            };


    $posbox.mouseover(function() {
        var i = $(this).index();
        $(this).addClass("anvh").siblings().removeClass("anvh");
        var selec = $(this).attr("selec");
        if ($seledbox.is(":hidden")) {
            $seledbox.show().css("left", 64 * i + 1).html("<div>" + anvjson[selec] + "</div>")
        } else {
            $seledbox.stop().animate({left: 64 * i + 1}, 200, function() {
                $("#seledbox").html("<div>" + anvjson[selec] + "</div>")
            })
        }
    });
    $anvlfteb.mouseleave(function() {
        $seledbox.hide();
        $posbox.removeClass("anvh");
    })
})