Question

我希望有一个表单自动填充并根据为我正在构建的网页选择的选项计算总计。我是javascript的新手，在这个网站上找到了以下代码示例，但无法按照我的意愿修改它。任何帮助，将不胜感激。复选框将计算但不会计算选择列表。

<html>
    <head>
        <script type = "text/javascript">
            var allprices = [];
            var index = 0;

            function chkrads(frmName,rbGroupName) {
                var chosen = "";
                var radios = document[frmName].elements[rbGroupName];
                for (var i=0; i <radios.length; i++) {
                    if (radios[i].checked) {
                        chosen = radios[i].value;
                    }
                }

                if (chosen == 0) {printprice = 0}
                if (chosen == 1) {printprice = 99}
                if (chosen == 2) {printprice = 150}
                if (chosen == 3) {printprice = 250}
                if (chosen == 21) {printprice = 200}
                if (chosen == 22) {printprice = 300}    
                if (chosen == 30) {printprice = 50}    
                if (chosen == 41) {printprice = 50}
                if (chosen == 42) {printprice = 70}
                if (chosen == 43) {printprice = 90}
                if (rbGroupName == "size") {index = 0}
                if (rbGroupName == "colour") {index = 1}
                if (rbGroupName == "frame") {index = 2}
                if (rbGroupName == "glass") {index = 3}
                if (rbGroupName == "hook") {index = 4}
                if (rbGroupName == "delivery") {index = 5}

                allprices[index] = printprice;

                var totalprice = 0;
                for (var i =0; i <allprices.length; i++) {
                    if (!isNaN(allprices[i])) {
                        totalprice = totalprice + allprices[i];
                    }
                }

                document.getElementById("result").style.display = "block";
                document.getElementById("result").innerHTML = totalprice;
            }
        </script>
    </head>
    <body>
        <form name= "myform" style="font-size:11px; font-family:Arial, Helvetica, sans-serif;">
            <select name = "size" onchange = "chkrads('myform', 'size')">
                <option></option>
                <option value = "0">0</option>
                <option value = "1">1</option>
            </select>
            </option><br>
            <br /><br /><br /><br />

            <input type = "radio" name = "colour" value = "0" onclick = "chkrads('myform', 'colour')"><b>No</b>
            <input type = "radio" name = "colour" value = "21" onclick = "chkrads('myform', 'colour')"><b>black</b>
            <input type = "radio" name = "colour" value = "22" onclick = "chkrads('myform','colour')"><b>Multi Colour</b>

            <br /><br /><br /><br />

            <input type = "radio" name = "frame" value = "0" onclick = "chkrads('myform', 'logo')">    <b>No</b>
            <input type = "radio" name = "frame" value = "30" onclick = "chkrads('myform', 'logo')"><b>Yes</b>
            <br /><br /><br /><br />

            <input type = "radio" name = "glass" value = "0" onclick = "chkrads('myform', 'glass')"><b>No</b>
            <input type = "radio" name = "glass" value = "51" onclick = "chkrads('myform',     'glass')"><b>Yes</b>

            <br /><br /><br /><br />

            <input type = "radio" name = "hook" value = "0" onclick = "chkrads('myform', 'hook')">    <b>0</b>
            <input type = "radio" name = "hook" value = "41" onclick = "chkrads('myform', 'hook')">    <b>1</b>
            <input type = "radio" name = "hook" value = "42" onclick = "chkrads('myform', 'hook')">    <b>2</b>
            <input type = "radio" name = "hook" value = "43" onclick = "chkrads('myform', 'hook')">    <b>3</b>

            <br /><br /><br /><br />

            <input type = "radio" name = "delivery" value = "0" onclick = "chkrads('myform',     'delivery')"><b>No</b>
            <input type = "radio" name = "delivery" value = "61" onclick = "chkrads('myform',     'delivery')"><b>Yes</b>

        </form>


        <div id="result" style="display:none;"><strong></strong> <span id="totalprice"></span>     </div>

    </body>
</html>

Answer 1

所以问题在于这句话：

if (radios[i].checked) {
        chosen = radios[i].value;

如果元素是复选框，

仅设置“selected”。

请改为尝试：

if (radios[i].checked || radios[i].selected) {
        chosen = radios[i].value;

我设置了一个jsfiddle：

http://jsfiddle.net/ARqQr/3/

在旁注中，这看起来像是使用knockoutjs很容易解决的问题，并且可能会稍微整理一下代码......

自动填充选择并选中复选框以计算价格

1 个答案: