哪位大哥幫幫看看哪里出錯了，顯示不出來
<!DOCTYPE ?HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>系好安全帶,準備啟航</title>
<script type="text/javascript">
? //通過javascript的日期對象來得到當前的日期，并輸出。
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 scoreStr = "小明:87;小花:81;小紅:97;小天:76;小張:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";
? var a1 = screStr.split(";");
?var sum = 0;
?for(var i = 0,i < a1.length,i++){
? ? ?sum += parseInt(a1.substr(3))
?}
document.write(mydate.getFullYear() + "年" + (mydate.getMonth()+1) + "月" + mydate.getDate() + "日" + " " + weekday[mydate.getDay()] + "--班級總分為：" + sum) ?
</script>
</head>
<body>
</body>
</html>
2018-09-19
無視我上面的言論，給你看了下，1:for（里面的符號是;不是,）? 2：?a1.substr(3)是什么東西不知道
下面是我給你改的 看看吧
<!DOCTYPE ?HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>系好安全帶,準備啟航</title>
<script type="text/javascript">
//通過javascript的日期對象來得到當前的日期，并輸出。
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 scoreStr = "小明:87;小花:81;小紅:97;小天:76;小張:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";
var a1 = scoreStr.split(";");
console.log('a1: ', a1)
var sum = 0;
for(var i = 0;i< a1.length;i++){
sum += parseInt(a1[i].split(":")[1])
}
sum= sum / a1.length
document.write(mydate.getFullYear() + "年" + (mydate.getMonth()+1) + "月" + mydate.getDate() + "日" + " " + weekday[mydate.getDay()] + "--班級總分為：" + sum)
</script>
</head>
<body>
</body>
</html>
2018-09-19
寫在head里了? 放到body??
2018-09-18
是scoreStr 不是screStr 。。。