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

  var time=new Date();

  var year=time.getFullYear();

  var month=time.getMonth()+1;

  var date=time.getDate();

  var day=time.getDay();

  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 arr=scoreStr.split(";");

var arr1=arr.join(":");

var arr2=arr1.split(":");

var scor,sum=0;

for(var i=1;i<arr2.length;i=i+2)

{

    sum=sum+parseInt(arr2[i]);

}

alert(arr2.length);

scor=parseInt(sum/arr2.length*2);

document.write(year+"年"+month+"月"+date+"日"+"  "+week[day]+"    平均分:"+scor);

。