单选按钮未在多步联系表单中验证

Question

我想验证此表单，但我无法验证这些单选按钮，请帮忙。并且还希望在某些字段错误时显示警报。/ * 这里是 HTML 代码* /<form id="regForm" action="/action_page.php">      <h1>Register:</h1>      <!-- One "tab" for each step in the form: -->      <div class="tab">Where do you want to move? *:        <p><label class="cont">Local          <input type="radio" name='thing' value='local' data-id="local">          <span class="checkmark"></span>        </label>        <label class="cont">Domestic          <input type="radio" name='thing' value='domestic' data-id="domestic">          <span class="checkmark"></span>        </label>        <label class="cont">International          <input type="radio" name='thing' value='international' data-id="international">          <span class="checkmark"></span>        </label>    </p>      </div>      <div class="tab">Name:        <div id="local" class="none">            <p>                <label class="cont">1 BHK Goods                  <input type="radio" name='size' value='1 bhk'>                  <span class="checkmark"></span>                </label>                <label class="cont">2 BHK Goods                  <input type="radio" name='size' value='2 bhk'>                  <span class="checkmark"></span>                </label>                <label class="cont">3 BHK Goods                  <input type="radio" name='size' value='3 bhk'>                  <span class="checkmark"></span>                </label>                <label class="cont">4 BHK/Villa Goods                  <input type="radio" name='size' value='3 bhk'>                  <span class="checkmark"></span>                </label>

Answer 1

function validateEmail(emailField){

        var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;

        if (reg.test(emailField.value) == false) 

        {

            alert('Invalid Email Address');

            return false;

        }

        return true;

}

<p><input type="email" placeholder="From..." oninput="this.className = ''" onblur="validateEmail(this);" name="email" ></p>