$(document).ready(function(){
                        $(".nav_nav ul li").mouseover(function(){
                           var arrId=$(this).attr("Id").split("_");
                           
                           $(this).parent("ul").find("li").removeClass("nav_navlihover");
                           $(this).parent("ul").find("li").addClass("nav_nav_ul_li");
                           $(this).removeClass("nav_nav_ul_li");
                           $(this).addClass("nav_navlihover");
                           
                           
                           $(".nav_cont").css({"display":"none"});
                           $(".nav_cont").eq(arrId[1]).css({"display":"block"});
                           
                        });
                    });

function CurentTime()
    { 
        var now = new Date();
       
        var year = now.getFullYear();       //年
        var month = now.getMonth() + 1;     //月
        var day = now.getDate();            //日
       
        var hh = now.getHours();            //时
        var mm = now.getMinutes();          //分
       
        var clock = year + "-";
       
        if(month < 10)
            clock += "0";
       
        clock += month + "-";
       
        if(day < 10)
            clock += "0";
           
        clock += day + " ";
       
        if(hh < 10)
            clock += "0";
           
        clock += hh + ":";
        if (mm < 10) clock += '0'; 
        clock += mm; 
        return(clock); 
    }