var mydate = new Date();

? var week = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];

? document.write("今天是：" + mydate.getFullYear()+ "年" + mydate.getMonth()+ "月" + mydate.getDate()+"日 "+week[mydate.getDay()]+"<br>");?

? //成績是一長竄的字符串不好處理，找規(guī)律后分割放到數(shù)組里更好操作哦

? 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 myarr = scoreStr.split(";");

? var myarr1 = new Array();

? for(i=0;i<10;i++){

? ? ? myarr1[i] = myarr[i].substring(3);

? }

? //document.write(myarr1+"<br>");

? //從數(shù)組中將成績撮出來，然后求和取整，并輸出。

? var sum = 0;

??

? for(j=0;j<10;j++){

? ? ? sum = sum + parseInt(myarr1[j]);

? }

? ave = sum/10;

? document.write("平均成績是：" + Math.round(ave));?