<!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">
var time=new Date();
var myarr=[["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","67"],["小曼","76"]];
function a
{var sum=0;
for(var i=0,i<myarr.length,i++)
{
sum=parseInt(sum)+parseInt(myarr[i][1]); }
}
document.write(time+"班级总分为:"+sum/10);
</script>
</head>
<body>
</body>
</html>
<script type="text/javascript">
var time=new Date();
var myarr=[["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"]];
function a()
{
var sum=0;
for(var i=0;i<myarr.length;i++)
{
sum=sum+parseInt(myarr[i][1]);
}
}
document.write(time+"班级总分为:"+sum/10);
</script>函数a后面没括号；
for循环里面要用分号不是逗号。
小迪的成绩是64不是67。