<script>

    function dateFormat(){

        var today=new Date();

        var week=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];

        var year=today.getFullYear(),

            month=today.getMonth(),

            date=today.getDate(),

            day=today.getDay(),

            hours=today.getHours(),

            minutes=today.getMinutes(),

            seconds=today.getSeconds();

           return "今天是"+year+"年"+month+"月"+date+"日"+week[day]+"<br/>"+hours+":"+minutes+":"+seconds; 

    }

    var datefor=dateFormat();

    document.write(datefor);

</script>