我希望有一个表单自动填写和计算基于我正在构建的网页选择的选项总数。我是新的javascript，并在这个网站上发现以下代码示例，但无法修改它的工作，因为我想。任何帮助都会很感激。复选框会计算，但选择列表不会。
<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>
问题是这个语句:
if (radios[i].checked) {
chosen = radios[i].value;
只在元素为复选框时设置" selected "。
试试这个:
if (radios[i].checked || radios[i].selected) {
chosen = radios[i].value;
我设置了一个jsfiddle:
http://jsfiddle.net/ARqQr/3/在一个侧面说明，这看起来会很容易解决使用knockoutjs，可能会整理代码一点…