可参考代码~
<!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 mydate = new Date();
var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
var myweek=weekday[mydate.getDay()];
var mymonth = mydate.getMonth()+1;
document.write(mydate.getFullYear()+"年"+mymonth+"月"+mydate.getDate()+"日"+" "+myweek);
//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 mystr = "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 myscr = mystr.split(";");
//从数组中将成绩撮出来,然后求和取整,并输出。
var i = 0, sum = 0, count = 0;
for(i ;i<myscr.length;i++){
var index = myscr[i].indexOf(":");
sum += parseInt(myscr[i].substr(index+1));
count ++;
}
if(count != 0){
document.write("--班级总分为:"+Math.floor(sum/count));
}
</script>
</head>
<body>
</body>
</html>