Javascript 如何通过字段集循环检查控件是否为空或未选择值？

目前，我有多个字段集5，但会不断增加，我希望在每个字段集中的每个元素之间循环以进行验证：

输入/文本区域文本框：检查是否为空

选择下拉菜单：检查值是否为0

以下是我的3个字段集：

    <!-- fieldsets -->
<fieldset style="max-width:400px;">
    <h2 class="fs-title">Create your account</h2>
    <h3 class="fs-subtitle">Step 1</h3>

    @Html.TextBoxFor(m => m.Email, new { @type = "email",@id = "email",  @name = "email", @placeholder="Email", @required = "*", @class = "form-control input-lg" })
    @Html.ValidationMessageFor(m => m.Email, "", new { @class = "text-danger" })

    @Html.TextBoxFor(m => m.Password, new { @type = "password", @class = "form-control input-lg", @id = "password", @placeholder="Password", @required = "*" })
    @Html.ValidationMessageFor(m => m.Password, "", new { @class = "text-danger" })

    @Html.TextBoxFor(m => m.ConfirmPassword, new { @type = "password", @class = "form-control input-lg", @id = "confirmpassword", @placeholder = "Confirm Password", @required = "*" })
    @Html.ValidationMessageFor(m => m.ConfirmPassword, "", new { @class = "text-danger" })
    <input type="button" name="next" class="next action-button" value="Next" />
</fieldset>

<fieldset style="max-width:400px;">
    <h2 class="fs-title">Upload your CV</h2>
    <h3 class="fs-subtitle">Step 2</h3>
    <input type="file" name="file" placeholder="Upload file" />
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="button" name="next" class="next action-button" value="Next" />
</fieldset>

<fieldset style="max-width:400px;">
    <h2 class="fs-title">Personal Details</h2>
    <h3 class="fs-subtitle">Step 3</h3>
    <input type="text" name="fname" placeholder="First Name" required />
    <input type="text" name="lname" placeholder="Last Name" />
    <input type="text" id="dob" name="dob" placeholder="Date of Birth" />
    <input type="text" name="phone" placeholder="Mobile Number" />
    @*<textarea name="address" placeholder="Address"></textarea>*@
    <input type="button" name="previous" class="previous action-button" value="Previous" />
    <input type="button" name="next" class="next action-button" value="Next" />
</fieldset>

---

谢谢您的帮助。

单击“下一步”按钮后，您可以尝试验证

$(".next").click(function(){
    $("fieldset").children().not("h2, h3, button").each(function(){
        if(!$(this).val()){
    alert("Empty!!")
    }
    })
})

---

要跳过不需要验证的元素，请使用not。

谢谢。这就是我想要它做的。感谢您的帮助！

$(".next").click(function(){
    $("fieldset").children().not("h2, h3, button").each(function(){
        if(!$(this).val()){
    alert("Empty!!")
    }
    })
})