//成績是一長竄的字符串不好處理，找規律后分割放到數組里更好操作哦
??? 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 count=0;
??? while(count<scoreStr.length){
??????? var result=scoreStr.indexOf(";",count);
??????? var str=scoreStr.substring(count,result)+"<br>";
??????? document.write("字段長度"+str.length+"<br>");
??????? document.write("字段："+str);
??????? document.write("計數器：起點"+count+"<br>計數器：終點："+result);
??????? count=count+str.length;
??????? document.write("下一個起點："+count+"<hr>");
??? }