javascript - Javascript 下拉列表的案例选择

Question

所以这是我第一次尝试 Javascript。我实际上是在尝试根据下拉框中选择的值生成唯一的 DIV。我有它来显示 DIV，但值不会根据选择的内容而改变。这是我到目前为止所得到的：

jsfiddle

正如您所看到的，当200,000美元的范围是选择我想要生产已计算的固定值。我很想知道是否有一个 switch 或 case select 语句，我可以根据下拉列表中选择的实际选项以某种方式生成更改 DIV 的语句。任何指向正确方向的指针将不胜感激。

Answer 1

如果您不想使用 jQuery，您可以尝试切换选择并设置 value1、value2、value3 的 innerHTML

    switch(document.getElementById('mySelect').value)
{
    case '0': 
        document.getElementById('value1').innerHTML ='Principal and Interest only: $898';
        document.getElementById('value2').innerHTML = 'Estimated total monthly payment: $1,098';
        document.getElementById('value3').innerHTML ='VA loan payment:';    
        break;   
    case '1': 
        document.getElementById('value1').innerHTML ='Principal and Interest only: $998';
        document.getElementById('value2').innerHTML = 'Estimated total monthly payment: $2,098';
        document.getElementById('value3').innerHTML ='VA loan payment: $25';    
        break;          
    etc...
}

Answer 2

以下是使用 jQuery 执行此操作的方法：

<select id="mySelect" onchange="showhide(this)">
    <option value="">Desired Home Price:</option>
    <!-- the option values are suffixes for the elements to show -->
    <option value="0">$200,000</option>
    <option value="1">$175,000</option>
    <option value="2">$150,000</option>
    <option value="3">$125,000</option>
    <option value="4">$100,000</option>
    <option value="5">$75,000</option>
    <option value="6">$50,000</option>
</select>

<div class="answer0 answers" style="width:200px;height:200px;display:none">
<div id="value1">Principal and Interest only: $898</div> 
<div id="value2">Estimated total monthly payment: $1,098</div>
<div id="value3">VA loan payment:</div>
<div id="value4">Another field:</div>
</div>

<div class="answer1 answers" style="width:200px;height:200px;display:none">
<div id="value1a">Principal and Interest only: $898.00</div> 
<div id="value2a">Estimated total monthly payment: $1,098.00</div>
<div id="value3a">VA loan payment:</div>
<div id="value4a">Another field:</div>
</div>



<script type="text/javascript">

function showhide(id) {
    var mySel = $(id).val()
    $('.answers').hide()  
    $('.answer'+mySel).show()  
}

</script>

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