Question

我照看我的非营利游泳俱乐部的网站;它由Squarespace主持，我们的财务主管要求我在membership page添加一个计算器，这样，如果他们希望一次性支付，预期会员可以轻松计算所需的按比例金额。如果每年支付一年全年费用为475英镑，那么如果在6月30日点击按钮，我希望它在页面上返回237.50英镑。看看其他一些答案，并使用我有限的Javascript知识，我已经想出了这个，但它并没有给我我期望的答案：

<!DOCTYPE html>
<html>
<body>

<p>Click the button to display the total pro-rata annual amount due, if membership starts tomorrow</p>

<button onclick="myFunction()">Click Me</button>

<p id="prorata"></p>

<script>
function myFunction() {
    var today = new Date();
    var totalDays = new Date(today.getFullYear(), today.getMonth(), 0).getDate();
    var daysLeft = (totalDays - today.getDate()) - 1; 
    var pricePerDay = 1.30;
    var n = daysLeft * pricePerDay;
    document.getElementById("prorata").innerHTML = n;
}
</script>

</body>
</html>

任何帮助都很明确！

Answer 1

这是你想要的吗？我确实喜欢这样：remaining_Days =（今年最后一天 - 今天）;

Pro rata = remaining_Days * 1.30;

＆＃13;

<!DOCTYPE html>
<html>
<body>

<p>Click the button to display the total pro-rata annual amount due, if membership starts tomorrow</p>

<button onclick="myFunction()">Click Me</button>

<p id="prorata"></p>

<script>
function myFunction() {
    
    var today = new Date();
    var year = new Date().getFullYear();
  
var oneDay = 24*60*60*1000; // hours*minutes*seconds*milliseconds
var firstDate = new Date();

var secondDate = new Date(year,11,31);

var diffDays = Math.round(Math.abs((firstDate.getTime() - secondDate.getTime())/(oneDay)));

    var n = diffDays* 1.30;
    document.getElementById("prorata").innerHTML = n;
}
</script>

</body>
</html>

＆＃13;

Javascript显示按比例分配的会员金额

1 个答案: