http://oshiete1.goo.ne.jp/qa3558102.html
ちょっと前に書いたのを改良してこんな感じでどうでしょう？
<html>
<head>
<script language=javascript>
var obj=new Array(10);
for(var i=0;i<obj.length;i++){
obj[i]=new Object;
obj[i].setObj=setObj;
}
//setObj(問題文,回答の選択肢をArrayでかく,正解番号、1項目目=0,配点);
obj[0].setObj("世界一長い川は？",Array("ナイル川","ミシシッピー川","アマゾン川"),0,10);
obj[1].setObj("実在するのは？",Array("バルカン市国","バルタン市国","バチカン市国"),2,10);
obj[2].setObj("省略:答えは0",Array("0","1","2"),0,10);
obj[3].setObj("省略:答えは0",Array("0","1","2"),0,10);
obj[4].setObj("省略:答えは0",Array("0","1","2"),0,10);
obj[5].setObj("省略:答えは0",Array("0","1","2"),0,10);
obj[6].setObj("省略:答えは0",Array("0","1","2"),0,10);
obj[7].setObj("省略:答えは0",Array("0","1","2"),0,10);
obj[8].setObj("省略:答えは0",Array("0","1","2"),0,10);
obj[9].setObj("省略:答えは0",Array("0","1","2"),0,10);
function setObj(question,answers,correct,point){
this.question=question;
this.answers=answers;
this.correct=correct;
this.point=point;
}
function check(f){
var point=0;
for(var i=0;i<obj.length;i++){
var num=getNumber(f["q-"+i]);
if(num >=0) point +=parseInt(f["q-"+i][num].value);
f["r-"+i].value =((obj[i].correct==num)?"○":"×");
f["a-"+i].value =obj[i].answers[obj[i].correct];
}
alert("あなたの点数は"+point+"点")
f.score.value=point;
}
function getNumber(radio){
for(var i=0;i<radio.length;i++){
if(radio[i].checked) return i;
}
return -1;
}
</script>
</head>
<body>
<form>
<script>
for(var i=0;i<obj.length;i++){
document.write("質問"+(i+1)+":"+obj[i].question+"("+obj[i].point+"点)"+"<br>")
for(var j in obj[i].answers){
document.write("<input type='radio' name='q-"+i+"' id='q-"+i+"-"+j+"' value='"+(j==obj[i].correct?obj[i].point:0)+"'><label for='q-"+i+"-"+j+"'>"+obj[i].answers[j]+"</label>")
}
document.write("<br><input size='3' type='text' name='r-"+i+"'><input type='text' name='a-"+i+"'>");
document.write("<br>")
}
</script>
<hr>
<input type="button" value="採点" onClick="check(this.form)"><br>
SCORE:<input type="text" name="score"><br>
</form>
</body>
</html>
