我找到了像我这样的主题，但我无法解决我的问题。所以我想通过对每个选项使用 if 语句而不使用 jquery 将价格乘以门票数量来计算单选票的成本。我不明白为什么我没有输出。看起来我的功能都不起作用，我也找不到原因。
你能帮帮我吗，我知道这很容易，但我还是个初学者
<!doctype html>
<html>
<head>
<title>No Boundaries</title>
<link rel="stylesheet" href="styles1.css">
<script type="text/javascript">
function validate(){
if(!document.form1.cond.checked)
{alert("Please accept the Terms and Conditions");
return false;
}
if(document.form1.name.value.length < 2)
{alert(“Please enter your full name, not just an initial”);
return false;
}
return true;
}
function cost() {
if (document.form1.accom["v"].checked) {
var amount = parseInt(document.form1.amount.value);
var ans = 90 * amount;
document.form1.total1.value = ans;
}
else if (document.form1.accom["t"].checked) {
var amount = parseInt(document.form1.amount.value);
var ans = 150 * amount;
document.form1.total1.value = ans;
}
else if (document.form1.accom["c"].checked) {
var amount = parseInt(document.form1.amount.value);
var ans = 45 * amount;
document.form1.total1.value = ans;
}
}
function post(){
if(document.form1.del["1"].checked){
var num = 0;
var ans = num;
document.form1.total2.value = ans;
}
if(document.form1.del["2"].checked){
var num = 12;
var ans = num;
document.form1.total2.value = ans;
}
if(document.form1.del["3"].checked){
var num = 16;
var ans = num;
document.form1.total2.value = ans;
}
if(document.form1.del["4"].checked){
var num = 20;
var ans = num;
document.form1.total2.value = ans;
}
}
function damage(){
var total1 = parseInt(document.form1.total1.value);
var total1 = parseInt(document.form1.total1.value);
var ans = total1 + total2;
document.form.total3.value = ans;
}
</script>
</head>
<body>
<section>
<form name="form1">
<fieldset>
<legend>Personal details</legend>
<div>
Please enter your full name<br>
<input name="name" type="text" required onsubmit="return validate();"><br>
</div>
<div>
Address<br>
<input name="addresss" type="text" required><br>
<input type="text"><br>
<input type="text"><br>
<input type="text"><br>
</div>
<div>
Phone Number<br>
<input name="phone" type="tel"><br>
</div>
<div>
Email Address<br>
<input name="email" type="email" required><br>
</div>
<div>
Date of Birth<br>
<input name="birth" type="date"><br>
</div>
</fieldset>
<fieldset>
<legend>Ticket Details</legend>
<div>
Type of T<br>
<label for="vil">V</label>
<input type="radio" name="accom[]" value="v">
<label for="town">T</label>
<input type="radio" name="accom[]" value="t">
<label for="con">C</label>
<input type="radio" name="accom[]" value="c">
</div>
<div>
Quantity of T
<input name="amount" type="number" min="1" max="10" required><br>
<br>
<input type="button" name="cost" value="C C" onclick="cost();"><br>
</div>
<div>
Delivery Options<br>
<input type="radio" name="del[]" value="1" >Free<br>
<input type="radio" name="del[]" value="2" >£12<br>
<input type="radio" name="del[]" value="3" >£16<br>
<input type="radio" name="del[]" value="4" >£20<br>
<br>
<input type="button" value="C D" onclick="post();"><br>
</div>
</fieldset>
<fieldset>
<legend>Terms And Conditions</legend>
<input name="cond" type="checkbox" onsubmit="return validate();">
</fieldset>
<fieldset>
<legend>Cost</legend>
<input type="text" name="total1" readonly><br>
<input type="text" name="total2" readonly><br>
<input type="text" name="total3" readonly><br>
<br>
<input type="button" value="C F C" onclick="damage();"><br>
</fieldset>
<br><br>
<fieldset>
<input type="submit">
</fieldset>
</form>
</section>
</body>
</html>最佳答案
成本函数应该是这样的，
function cost() {
if (document.form1.accom.value.toLowerCase() == "v") {
var amount = parseInt(document.form1.amount.value);
var ans = 90 * amount;
document.form1.total1.value = ans;
} else if (document.form1.accom.value.toLowerCase() == "t") {
var amount = parseInt(document.form1.amount.value);
var ans = 150 * amount;
document.form1.total1.value = ans;
} else if (document.form1.accom.value.toLowerCase() == "c") {
var amount = parseInt(document.form1.amount.value);
var ans = 45 * amount;
document.form1.total1.value = ans;
}
}
并且为了让代码更加重构，就这样吧，
function cost() {
var val = document.form1.accom.value.toLowerCase();
var amount = parseInt(document.form1.amount.value);
var ans;
if (val == "v") {
ans = 90 * amount;
} else if (val == "t") {
ans = 150 * amount;
} else if (val == "c") {
ans = 45 * amount;
}
document.form1.total1.value = ans;
}
关于javascript - 带有单选标签的简单js计算器，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43221744/