setInterval(function(){   
        var date = new Date();   
        var year = date.getFullYear();    //获取当前年份   
        var mon = date.getMonth()+1;      //获取当前月份   
        var da = date.getDate();          //获取当前日   
        var day = date.getDay();          //获取当前星期几   
        var h = date.getHours();          //获取小时   
        var m = date.getMinutes();        //获取分钟   
        var s = date.getSeconds();        //获取秒   
        var d = document.getElementById('Date');    
          d.innerHTML=year+'年'+mon+'月'+da+'日'+'星期'+day;  
        },1000)