<script type="text/javascript">

  var date=new Date();

        var year=date.getFullYear();

        var mouth=date.getMonth()+1;

        var day=date.getDate();

        var days=date.getDay();

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

        var formatday=year+"年"+mouth+"月"+day+"日---"+weekday[days];

        document.write(formatday+"<br/>");

        var scoreStr = "小明:87;小花:81;小红:97;小天:76;小张:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";

        var persons=scoreStr.split(";");

        var num=0;

        for(var i=0;i<persons.length;i++){

            var a=persons[i].split(":");

            document.write(a[0]+"的成绩为："+a[1]+"<br />"); //实现每个人成绩的输出

            num=num+parseInt(a[1]); // 累加总分

        }

        document.write("总分："+num+"<br/>");

        document.write("平均分："+Math.round(num/persons.length));

</script>