javascript - 根据下拉值更改表单字段

Question

我有一个 HTML，其中开头有下拉菜单，如何根据下拉值的选择更改表单字段？这是代码。

就像如果我选择常规查询，它应该显示前 2 个表单字段和常规 div 中的表单字段
如果我选择信用查询，它应该显示前 2 个表单字段以及信用 div 中的表单字段
如果我选择付款查询，它应该显示前 2 个表单字段以及付款 div 中的表单字段

 <form action="">
        <select name="cases" id="cases">
            <option value="general">General Inquiry</option>
            <option value="credit">Credit Inquiry</option>
            <option value="payment">Payment Issue</option>
        </select><br>
        <label for="email">Email Address <span>*</span></label>
        <input type="text">
        <label for="full name">Full Name <span>*</span></label>
        <input type="text">
        
        
        <div class="general" id="general">
            <label for="documents">Wish to submit any requested documents?</label>
            <input type="radio" name="radio">Yes
            <input type="radio" name="radio">No <br><br>
            <label for="select">How did you find out about us?<span>*</span></label><br>
            <select name="case" id="case-type">
                <option value="value1">Value 1</option>
                <option value="value2">Value 2</option>
                <option value="value3">Value 3</option>
            </select><br>
        </div>
        
        <div class="credit" id="credit">
            <label for="Date of Inquiry">Date of Inquiry<span>*</span></label>
            <input type="date">
            <label for="Agency">Agency 3 <span>*</span></label>
            <input type="text">         
        </div>
        
        <div class="payment" id="payment">
            <label for="Service Phone Number">Service Phone Number<span>*</span></label>
            <input type="text">
            <label for="select">Topic<span>*</span></label><br>
            <select name="case" id="case-type">
                <option value="topic1">Topic 1</option>
                <option value="topic2">Topic 2</option>
                <option value="topic3">Topic 3</option>
            </select><br><br>
        </div>
        <br><br>
        <button>Submit</button>
    </form>

Answer 1

这里的聚会迟到了，但这里有另一种方式

    // hide all the divs
    $('div').hide()

    // Show and hide selected div
    $('#cases').change(function () {
        var value = this.value;

        $('div').hide()
        $('#' + this.value).show();
    });

还创建了一个demo