<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>系好安全带,准备启航</title>
<script type="text/javascript">
//通过javascript的日期对象来得到当前的日期，并输出。
var date = new Date();
document.write(date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日");
var week = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
document.write(" "+week[date.getDay()]);
//成绩是一长窜的字符串不好处理，找规律后分割放到数组里更好操作哦
var sorceStr = "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 = sorceStr.split(";");
var arrSorce = new Array();
for(var i = 0; i < arr.length; i++)
arrSorce[i]=arr[i].substring(3,5);
//从数组中将成绩撮出来，然后求和取整，并输出。
var sum = 0;
for(var i = 0; i < arrSorce.length; i++)
sum = sum + parseInt(arrSorce[i]);
document.write("--班级总分为："+Math.round(sum/arrSorce.length));
</script>
</head>
<body>
</body>
</html>
