求大神帮忙看看:无任何运行结果,哪里错了~
<title>成绩单</title>
<script type="text/javascript">
var currentDate=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","星期日"];
document.write(currentDate.getFullYear()+"年"+currentDate.getMonth()+"月"+currentDate.getDate()+"日"+" "+weekday[currentDate.getDay()]);
//通过javascript的日期对象来得到当前的日期,并输出。
//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";
var scoreString=scoreStr.split(";");
var j=0;
var sum=0;
for(j;j<scoreString.length;j++)
{
sum+=parseInt(scoreString[j].substr(scoreString[j].indexOf(":")+1));
}
document.write("--班级总分为:"+Math.round(sum/scoreString.length);
//从数组中将成绩撮出来,然后求和取整,并输出。