我正在使用此代码对多个单选按钮的值进行求和:
$(document).ready(function(){
var total = 50000;
$("input[type=radio]").change(function(){
$("input[type=radio]:checked").each(function(){
if (isNaN($(this).val())) {
total = total;
}
else
total += parseFloat($(this).val());
});
$(".price_amount").text(total);
});
});
问题是,当用户点击组中的单选按钮然后选择该组中的另一个单选按钮时,新值将添加到此,我只想将其中一个值添加到总值。< / p>
例如在这个组中:
<div>
<input type="radio" value="0" name="markuptype" class="pack_radio" checked="checked"><h4>W3C Valid HTML 4.01</h4>
<span class="pack_price">-</span>
</div>
<div>
<input type="radio" value="5000" name="markuptype" class="pack_radio"><h4>W3C Valid XHTML 1.0 Transitional</h4>
<span class="pack_price">5,000</span>
</div>
<div>
<input type="radio" value="15000" name="markuptype" class="pack_radio"><h4>W3C Valid XHTML 1.0 Strict</h4>
<span class="pack_price">15,000</span>
</div>
当用户第一次选择seconed radio时,5000将添加到总价中,但如果他将其更改为第三个选项,则15000 + 5000将添加到总数中,我想只有其中一个!
答案 0 :(得分:1)
对我来说,问题似乎是total
var声明超出了change
回调的范围。这将导致change
回调的关闭包含total
变量,因此它的值将在后续change
次调用中保留。
如果在此回调中声明total
,您应该没问题:
$("input[type=radio]").change(function(){
var total = 5000; // => declared locally, so initialized at each change.
$("input[type=radio]:checked").each(function(){
if (isNaN($(this).val())) {
total = total;
}
else
total += parseFloat($(this).val());
});
$(".price_amount").text(total);
});
答案 1 :(得分:0)
我最近写了一个简单的例子来证明这一点(虽然我没有使用jQuery就这样做了。)
只需存储您添加的值,然后在添加新值之前将其从总数中减去。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html lang="en">
<head>
<title>Radio Test</title>
</head>
<body>
<form action="" method="get" id="myForm">
<fieldset id="myRadioGroup">
<legend>Radios</legend>
<div>
<label> <input type="radio" value="0" name="add" checked> 0 </label>
</div>
<div>
<label> <input type="radio" value="20" name="add"> 20 </label>
</div>
<div>
<label> <input type="radio" value="30" name="add"> 30 </label>
</div>
</fieldset>
<div id="total">45</div>
</form>
<script type="text/javascript">
(function () {
var group = document.forms.myForm.elements.add;
var currentValue = function currentValue () {
for (var i = 0, j = group.length; i < j; i++) {
if (group[i].checked) {
return Number(group[i].value);
}
}
};
var oldValue = currentValue();
var total = document.getElementById('total').firstChild;
var update = function update () {
var current = currentValue();
total.data = Number(total.data) - oldValue + current;
oldValue = current;
};
for (var i = 0, j = group.length; i < j; i++) {
group[i].onchange = update;
}
}());
</script>
</body>
</html>
答案 2 :(得分:0)
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
</head>
<body>
<div>
<input type="radio" value="0" name="markuptype" class="pack_radio" checked="checked"><h4>
W3C Valid HTML 4.01</h4>
<span class="pack_price">-</span>
</div>
<div>
<input type="radio" value="5000" name="markuptype" class="pack_radio"><h4>
W3C Valid XHTML 1.0 Transitional</h4>
<span class="pack_price">5,000</span>
</div>
<div>
<input type="radio" value="15000" name="markuptype" class="pack_radio"><h4>
W3C Valid XHTML 1.0 Strict</h4>
<span class="pack_price">15,000</span>
</div>
</body>
<script type="text/javascript">
$(function()
{
$('input:radio').change(function()
{
var total = 50000;
$('input:radio:checked').each(function()
{
if (isNaN(this.value))
total = total;
else
total += parseFloat(this.value);
});
$('.price_amount').text(total);
});
});
</script>
</html>