有点投机取巧嘻嘻。
<!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 T = new Date();
T.getTime()
var week = ["一","二","三","四","五","六","日"];
document.write(T.getFullYear()+"年"+T.getMonth()+"月"+T.getDate()+"日,"+"星期"+week[T.getDay()-1]+"<br>");
//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 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";
//0-5 6-11 12-17
var grade = new Array();
var s = 0;
for(var i=0;i<=9;i++){
grade[i] = scoreStr.substring(s,s+5);
s+=6;
}
document.write(grade+"<br>");
var Allgrade = 0;
for(var j=0;j<grade.length-1;j++){
Allgrade+=parseFloat(grade[j].substring(3,5));
}
document.write("平均成绩:"+Math.round(Allgrade/grade.length))
//从数组中将成绩撮出来,然后求和取整,并输出。
</script>
</head>
<body>
</body>
</html>