我创建了(在模板上构建)一个简单的 js 表单。一切都与“ radio ”和“选择”输入一起工作，但我无法将“范围”值与其他所有内容连接起来。
这就是表单和计算的工作原理:(抱歉有很多菜鸟代码)
function showVal(newVal){
document.getElementById("valBox").innerHTML=newVal;
}
function valNum(){
var valNum = document.getElementById("valBox")
}
var cake_prices = new Array();
cake_prices["Round6"]=9;
cake_prices["Round8"]=11;
cake_prices["Round10"]=12;
var filling_prices= new Array();
filling_prices["Yearone"]=12;
filling_prices["Yeartwo"]=60;
filling_prices["Yearthree"]=120;
var billing_prices= new Array();
billing_prices["Billone"]=100;
billing_prices["Billtwo"]=200;
billing_prices["Billthree"]=300;
billing_prices["Billfour"]=400;
billing_prices["Billfive"]=300;
function getCakeSizePrice()
{
var cakeSizePrice=0;
//Get a reference to the form id="cakeform"
var theForm = document.forms["cakeform"];
//Get a reference to the cake the user Chooses name=selectedCake":
var selectedCake = theForm.elements["selectedcake"];
//Here since there are 4 radio buttons selectedCake.length = 4
//We loop through each radio buttons
for(var i = 0; i < selectedCake.length; i++)
{
//if the radio button is checked
if(selectedCake[i].checked)
{
//we set cakeSizePrice to the value of the selected radio button
//i.e. if the user choose the 8" cake we set it to 25
//by using the cake_prices array
//We get the selected Items value
//For example cake_prices["Round8".value]"
cakeSizePrice = cake_prices[selectedCake[i].value];
//If we get a match then we break out of this loop
//No reason to continue if we get a match
break;
}
}
//We return the cakeSizePrice
return cakeSizePrice;
}
function getBillingPrice()
{
var cakeBillingPrice=0;
//Get a reference to the form id="cakeform"
var theForm = document.forms["cakeform"];
//Get a reference to the select id="filling"
var selectedBilling = theForm.elements["billing"];
//set cakeFilling Price equal to value user chose
//For example filling_prices["Lemon".value] would be equal to 5
cakeBillingPrice = billing_prices[selectedBilling.value];
//finally we return cakeFillingPrice
return cakeBillingPrice;
}
function calculateTotal()
{
//Here we get the total price by calling our function
//Each function returns a number so by calling them we add the values they return together
var cakePrice = (getCakeSizePrice() + getBillingPrice()) * valNum();
var num = (cakePrice);
var miPrice = parseInt (num - (num * .35));
var miDiff = parseInt(cakePrice - miPrice);
//display the result
var divobj = document.getElementById('totalPrice');
divobj.style.display='block';
divobj.innerHTML = "Total "+cakePrice;
var divobj = document.getElementById('miPrice');
divobj.style.display='block';
divobj.innerHTML = "Total "+miPrice;
var divobj = document.getElementById('miDiff');
divobj.style.display='block';
divobj.innerHTML = "Total "+miDiff;
}<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
<title>Cake Form</title>
<script type="text/javascript" src="js/formcalculations.js"></script>
<link href="styles/cakeform.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="wrap">
<form action="" id="cakeform" onsubmit="return false;">
<div>
<div class="cont_order">
<fieldset>
<label >Select your province</label>
<label class='radiolabel'><input type="radio" name="selectedcake" value="Round6" onclick="calculateTotal()" />SASKATCHEWAN</label><br/>
<label class='radiolabel'><input type="radio" name="selectedcake" value="Round8" onclick="calculateTotal()" />MANITOBA</label><br/>
<label class='radiolabel'><input type="radio" name="selectedcake" value="Round10" onclick="calculateTotal()" />ALBERTA</label><br/>
<br/>
<br/>
<br>
</br>
<label >BILL</label>
<select id="billing" name='billing' onchange="calculateTotal()">
<option value="Billone">100</option>
<option value="Billtwo">200</option>
<option value="Billthree">300</option>
<option value="Billfour">400</option>
<option value="Billfive">500</option>
</select>
<br/>
<label >TOTAL WITH UTILITY</label>
<div id="totalPrice"></div>
<label >TOTAL WITH MI</label>
<div id="miPrice"></div>
<label >TOTAL SAVED</label>
<div id="miDiff"></div>
<br>
<span id="valBox"></span>
<input type="range" min="5" max="10" step="1"
oninput="showVal(this.value)" onchange="showVal(this.value)">
</fieldset>
</div>
</div>
</form>
</div><!--End of wrap-->
</body>
</html>没有“范围”输入和 valNum (我创建正确吗？)功能，一切都正常。 就像我正在做的那样:
function calculateTotal()
{
var cakePrice = (getCakeSizePrice() + getBillingPrice());
}
但是当我添加 newVal 函数时，chrome 显示总计:NaN;
function calculateTotal()
{
var cakePrice = (getCakeSizePrice() + getBillingPrice()+newVal();
}
最佳答案
everything is working without "range" input and valNum (do i created it correctly?) function....
var cakePrice = (getCakeSizePrice() + getBillingPrice()) * valNum();
-valNum() func 不返回任何值。
but when I'm adding newVal function chrome showing me total: NaN;
var cakePrice = (getCakeSizePrice() + getBillingPrice()+newVal();
-我在代码中没有看到 newVal() 函数。有一个newVal变量，但它的作用域仅限于fucntion。
定义一个全局变量，然后定义函数如下:
var valNum;
function valNum(){
valNum = document.getElementById("valBox")
}
并使用valNum，如下所示:
var cakePrice = (parseFloat(getCakeSizePrice()) + parseFloat(getBillingPrice())) * parseFloat(valNum);
关于javascript - 无法将输入范围值正确连接到 JavaScript 计算，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37626223/