请问怎样简化这段代码,感觉写的太冗余了。
<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 myyear=mydate.getFullYear();
var mymonth=mydate.getMonth();
var myday=mydate.getDate();
var myweek=mydate.getDay(weekday);
//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 myarr= new Array(10);
myarr[0]=parseInt(scoreStr.substr(3,2));
myarr[1]=parseInt(scoreStr.substr(9,2));
myarr[2]=parseInt(scoreStr.substr(15,2));
myarr[3]=parseInt(scoreStr.substr(21,2));
myarr[4]=parseInt(scoreStr.substr(27,2));
myarr[5]=parseInt(scoreStr.substr(33,2));
myarr[6]=parseInt(scoreStr.substr(39,2));
myarr[7]=parseInt(scoreStr.substr(45,2));
myarr[8]=parseInt(scoreStr.substr(51,2));
myarr[9]=parseInt(scoreStr.substr(57,2));
var sum=0;
var aveg;
for(i=0;i<=myarr.length-1;i++){
sum=sum+myarr[i];
}
aveg=sum/10;
var aveg1=Math.round(aveg);
document.write(myyear+"年"+mymonth+"年"+myday+"日"+" " +weekday[myweek]+"--班级总分为:"+aveg1);
//从数组中将成绩撮出来,然后求和取整,并输出。