// 項目の合計を計算
function checking() {
  chn = 23; // ラジオボタンとチェックボックスの総数
  ttl = 0;
  
  type_a = "/check_a.html";
  type_b = "/check_b.html";
  type_c = "/check_c.html";
  type_d = "/check_d.html";

  for(i=0; i<chn; i++) {
    if(document.nForm.elements[i].checked) {
      ttl += eval(document.nForm.elements[i].value);
    }
  }
	if(ttl >=0 && ttl <= 2){
	
	//alert(ttl + "- typeA");
	//answer.location.href="check_a.html"; 
	document.getElementById("answer").src = "check_a.html";
	document.getElementById('answer').style.height = "310px";

	}else if(ttl >=3 && ttl <= 10){
	
	//alert(ttl + "- typeB");
	document.getElementById("answer").src = "check_b.html";
	document.getElementById('answer').style.height = "450px";
	
	}else if(ttl >=11 && ttl <= 20){
	
	//alert(ttl + "- typeC");
	document.getElementById("answer").src = "check_c.html";
	document.getElementById('answer').style.height = "600px";
	
	}else if(ttl >=21 && ttl <= 80){
	
	//alert(ttl + "- typeD");
	document.getElementById("answer").src = "check_d.html";
	document.getElementById('answer').style.height = "760px";
	
	}
	
}