JavaScript 计算定价表单在 PC 上不起作用。适用于 Mac。有人能找到错误吗？

Question

谁能帮我找出问题所在？我永远感谢这个网站已经提供的帮助，并感谢任何建议或想法。谢谢。

实际页面可以在这里看到:http://www.procollage.com/pricing/photo-collage-pricing.html

 <script LANGUAGE="JavaScript">
function calculate(PricingForm) {
    height = PricingForm.height.value;
    width = PricingForm.width.value;
    photos = PricingForm.photos.value;
    lgtext = PricingForm.lgtext.value;
    mountlam = PricingForm.mount.value;
    mountlam = PricingForm.lam.value;

    price = GetPrice(PricingForm, height, width, photos, lgtext, mount, lam)
    document.PricingForm.collageEstimate.value = "$" + RoundToPennies(price);
}

function GetPrice(PricingForm, height, width, photos, lgtext, mount, lam) {

        price = height * width;
        price = price / 144;
        pricetwo = price; // for lookup later
        price = price * 15;

        price = (PricingForm.lgtext.checked) ? price + 20 : price;
        price = (PricingForm.mount.checked) ? price + pricetwo * 5 : price;
        price = (PricingForm.lam.checked) ? price + pricetwo * 5 : price;

        return (photos * 4.95) + price;
}

function RoundToPennies(n) {
    pennies = n * 100;
    pennies = Math.round(pennies);
    strPennies = "" + pennies;
    len = strPennies.length;
    return strPennies.substring(0, len - 2) + "." + strPennies.substring(len - 2, len);
}

</script>

Answer 1

calculate 函数中既没有mount 也没有lam 变量，我认为是复制/粘贴错误，看:

function calculate(PricingForm) {
  //...
  mountlam = PricingForm.mount.value; // <--- the same identifier
  mountlam = PricingForm.lam.value;   // <---

  price = GetPrice(PricingForm, height, width, photos, lgtext, mount, lam);
  //..                                                           ^     ^
}

应该是:

//...
mount = PricingForm.mount.value;
lam = PricingForm.lam.value;

price = GetPrice(PricingForm, height, width, photos, lgtext, mount, lam);
//..

另请注意，如果您在不使用 var 语句的情况下进行赋值，这些变量将成为全局变量...