radio單選中電子郵箱把下方寫著電子郵箱的div隱藏，而單選中手機把下方寫著手機的div隱藏，代碼如下，如何寫js<div class="rs-validation">     <label for="">驗證方式</label>     <form>         <div class="formemail">             <input type="radio" checked="checked" name="validation" value="1">             <span>電子郵箱</span>         </div>         <div class="formmobile">             <input type="radio" name="validation" value="2">             <span>手機</span>         </div>     </form></div><div class="email-wrap">     電子郵箱</div><div class="moblie-wrap" style="display:none">     手機號</div>