execution of JavaScript

你能帮我了解代码有什么问题，以及为什么当我点击它时按钮不起作用。我相信我错过了一些小部分，我找不到它。

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Conditions</title>
    <link href="css/styles.css" rel="stylesheet">
    <script>
        function AgeCh 
    {
    var Age = prompt("Please enter your age here","from 4 to 100");
        if (Age >= 16) 
        {
    document.write("You are old enough to drive.");
        } 
        else if (Age >=21) 
        {
    document.write("You are old enough to drive and vote.");
        } 
        else if (Age >=65)
        {
    document.write("You are old enough to drive, vote and retire.");
        }
        else 
        {
            document.write ("thinks");
        }
}
    </script>
</head>
<body>

    <div class="classselector">
  <button type = "button" onclick="AgeCh()">Age Checker</button>
    </div>

</body>
</html>

我真的很感激你的帮助。我真的不知道为什么javascript在这里不起作用。

您在 Agech 中缺少()。函数应该像AgeCh()一样定义

更正的代码：

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Conditions</title>
    <link href="css/styles.css" rel="stylesheet">
    <script>
        function AgeCh() 
    {
    var Age = prompt("Please enter your age here","from 4 to 100");
        if (Age >= 16) 
        {
    document.write("You are old enough to drive.");
        } 
        else if (Age >=21) 
        {
    document.write("You are old enough to drive and vote.");
        } 
        else if (Age >=65)
        {
    document.write("You are old enough to drive, vote and retire.");
        }
        else 
        {
            document.write ("thinks");
        }
}
    </script>
</head>
<body>

    <div class="classselector">
  <button type = "button" onclick="AgeCh()">Age Checker</button>
    </div>

</body>
</html>

似乎是定义函数的错误。我使用 let AgeCh = function() {} 重新定义了您的函数，这似乎可以让您的函数正常工作。

https://plnkr.co/edit/rHBbofiwvO55bCLDA4jg?p=preview

函数文档：https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions

是的，

请检查您的函数声明是否错误它喜欢

 function AgeCh 
  {

更改为

function AgeCh()
{

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