$(document).ready(function(){
//    nav-li hover e
    var num;
    $('.nav-main>li[id]').hover(function(){
       /*鍥炬爣鍚戜笂鏃嬭浆*/
        $(this).children().removeclass().addclass('hover-up');
        /*涓嬫媺妗嗗嚭鐜?/
        var obj = $(this).attr('id');
        num = obj.substring(3, obj.length);
        $('#box-'+num).slidedown(300);
    },function(){
        /*鍥炬爣鍚戜笅鏃嬭浆*/
        $(this).children().removeclass().addclass('hover-down');
        /*涓嬫媺妗嗘秷澶?/
        $('#box-'+num).hide();
    });
//    hidden-box hover e
    $('.hidden-box').hover(function(){
        /*淇濇寔鍥炬爣鍚戜笂*/
        $('#li-'+num).children().removeclass().addclass('hover-up');
        $(this).show();
    },function(){
        $(this).slideup(200);
        $('#li-'+num).children().removeclass().addclass('hover-down');
    });
});