質問編集履歴
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ソース追加
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### 該当のソースコード
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```html
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<body>
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<form>
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<label><input type="radio" name="move" value="bus" id="kind-1">バス</label>
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<label><input type="radio" name="move" value="train">電車</label>
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</form>
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<form>
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<div class="second" id="bus">
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<label><input type="radio" name="grade" value="bus_high">バス/高級</label>
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<label><input type="radio" name="grade" value="bus_normal">バス/普通</label>
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</div>
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<div class="second" id="train">
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<label><input type="radio" name="grade" value="train_high">電車/高級</label>
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<label><input type="radio" name="grade" value="train_normal">電車/普通</label>
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</div>
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</form>
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<div class="third" id="bus_high">高級バス</div>
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<div class="third" id="bus_normal">バス</div>
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<div class="third" id="train_high">高級電車</div>
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<div class="third" id="train_normal">電車</div>
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</body>
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```
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```css
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.second , .third{
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display: none;
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}
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```
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```js
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// ラジオボタンで表示/非表示
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document.addEventListener('change',function(e){
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var t=e.target;
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if(t.name=="status") document.querySelector('#'+t.value).checked=true;
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});
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// リンククリックでラジオボタンにチェック入れる
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window.addEventListener('DOMContentLoaded', function(e){
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document.querySelector(location.hash).checked=true;
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});
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// ラジオボタン2段階で表示
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document.addEventListener('change',function(e){
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var t=e.target;
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if(t.name=="move"){
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Array.prototype.forEach.call(document.querySelectorAll('.second,.third'),function(x){
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if(x.id==t.value){
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x.style.display="block";
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Array.prototype.forEach.call(x.querySelectorAll('[type=radio]'),function(y){
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y.checked=false;
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});
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}else{
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x.style.display="none";
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}
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});
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}
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if(t.name=="grade"){
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Array.prototype.forEach.call(document.querySelectorAll('.third'),function(x){
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x.style.display=(x.id==t.value)?"block":"none";
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});
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}
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});
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```
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ソースは以前回答していただいたものをそのまま使用しています。
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