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我目前正在使用单选按钮和复选框。在这个示例项目中，我有单选按钮和复选框，根据用户选择的值显示图像。

如何为所选的每个项目添加价值价格并在底部显示总成本？例子

下面的 js 显示了我根据选择的值显示图像的过程。

JS

<script>
function check_value(currentElement, val, id, type) {
    var el = document.getElementById("imgBox" + id);
    if (val > 0 && val < 4) { //will trigger when [1,2,3]

        if(currentElement.checked)
        {
            el.src = "images/" + type + val + ".jpg";
            el.style.display = "";
        }
        else
        {
            el.src = "";
            el.style.display = "none";
        }           
    }
}    
</script>

HTML 

<h2>Choose a bike</h2>
<form name="builder">
    <input type="radio" name="field" onclick='check_value(this, 1, 1, "bike")'/> KAWASAKI KX 450F- $8,399<br />
    <input type="radio" name="field" onclick='check_value(this, 2, 1, "bike")'/> 2010 Yamaha Road Star S- $13,090<br />
    <input type="radio" name="field" onclick='check_value(this, 3, 1, "bike")'/> Aprilia RSV4- $16,999<br />
</form>

<img id="imgBox1" src="#" style="display:none"> 

<h2>Choose a tire</h2>  
<form name="tire">
    <input type="radio" name="field" onclick='check_value(this, 1, 2, "tire")'/> Michelin Pilot Road 3 Tires- $299.99<br />
    <input type="radio" name="field" onclick='check_value(this, 2, 2, "tire")'/> Dunlop Roadsmart Sport-Touring Tires- $154.99<br />
    <input type="radio" name="field" onclick='check_value(this, 3, 2, "tire")'/> Pirelli Scorpion Trail Tires- $119.99<br />
</form>

<img id="imgBox2" src="#" style="display:none">

<h2>Choose Accesories</h2>
<form name="tire">
    <input type="checkbox" name="field" onclick='check_value(this, 1, "3a", "accessories")'/> Chrome Front Plate- $246.50<br />
    <input type="checkbox" name="field" onclick='check_value(this, 2, "3b", "accessories")'/> Jacket- $87.99<br />
    <input type="checkbox" name="field" onclick='check_value(this, 3, "3c", "accessories")'/> Gloves- $35.99            
</form>

<div id="accessories">
    <img id="imgBox3a" src="#" style="display:none">
    <img id="imgBox3b" src="#" style="display:none">
    <img id="imgBox3c" src="#" style="display:none">
</div>
4

1 回答 1

4

我会开始

  1. 删除不必要的 formTags并将其减少到一个。
  2. 更改输入名称（例如：收音机的“cylces”和“tire”以及“frontPlate”请参见下面的代码）。
  3. 正确的功能（减少参数）并将价格设置为输入字段的值属性
  4. 添加for-loop以计算当前总计

我们到了 ...

<head>
    <title></title>
    <script>
        function check_value(curElem, id) {
            var el = document.getElementById("img" + curElem.name);
            el.src = "images/" + curElem.name + id + ".jpg";
            if (!curElem.checked)
                el.style.display = "none";
            else
                el.style.display = "block";

            // calculate Total
            var total = 0;
            var controls = document.getElementsByTagName('input');
            for (var i = 0; i < controls.length; i++) {
                if ((controls[i].type === 'radio' || controls[i].type === 'checkbox') && controls[i].checked)
                    total = total + parseFloat(controls[i].value);
            }
            document.getElementById("total").innerHTML = total;
            //alert("Total: " + total);
        }    
    </script>
</head>
<body>
    <form name="builder">
        <h2>
            Choose a bike</h2>
        <input type="radio" name="Bike" value="8399" onclick='check_value(this, 1)' />
        KAWASAKI KX 450F- $8,399<br />
        <input type="radio" name="Bike" value="13090" onclick='check_value(this, 2)' />
        2010 Yamaha Road Star S- $13,090<br />
        <input type="radio" name="Bike" value="16999" onclick='check_value(this, 3)' />
        Aprilia RSV4- $16,999<br />
        <img id="imgBike" src="#" style="display: none" />
        <h2>
            Choose a tire</h2>
        <input type="radio" name="Tire" value="299.99" onclick='check_value(this, 1)' />
        Michelin Pilot Road 3 Tires- $299.99<br />
        <input type="radio" name="Tire" value="154.99" onclick='check_value(this, 2)' />
        Dunlop Roadsmart Sport-Touring Tires- $154.99<br />
        <input type="radio" name="Tire" value="119.99" onclick='check_value(this, 3)' />
        Pirelli Scorpion Trail Tires- $119.99<br />
        <img id="imgTire" src="#" style="display: none" />
        <h2>
            Choose Accesories</h2>
        <input type="checkbox" name="FrontPlate" value="246.50" onclick='check_value(this, "")' />
        Chrome Front Plate- $246.50<br />
        <input type="checkbox" name="Jacket" value="87.90" onclick='check_value(this, "")' />
        Jacket- $87.99<br />
        <input type="checkbox" name="Gloves"  value="35.99" onclick='check_value(this, "")' />
        Gloves- $35.99
        <div id="accessories">
            <img id="imgFrontPlate" src="#" style="display: none" />
            <img id="imgJacket" src="#" style="display: none" />
            <img id="imgGloves" src="#" style="display: none" />
        </div>
        <div id="total"></div>
    </form>
</body>

尽管这可能是您的答案的解决方案-我看不到此代码的用途。在现实生活环境中，大部分数据将来自生成的服务器，因此您必须完全重新执行此代码！

于 2012-09-09T21:00:36.777 回答