执行JavaScript
[英]execution of JavaScript
问题描述
could you help me understand what's wrong with the code and why the button doesn't work when I click on it. 
您能否帮助我了解代码的问题以及为什么单击按钮后按钮不起作用？ I believe that I missed some little part and I can't find it. 我相信我错过了一小部分，但找不到。
<!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>
I would really appreciate the help. 我非常感谢您的帮助。 I really lack any ideas of why the javascript doesn't work here. 我真的不知道为什么javascript在这里不起作用。
3 个解决方案
解决方案1
0 已采纳 2017-05-17 04:15:15
You are missing () in AgeCh. 您在AgeCh中丢失() 。 Function should be defined like AgeCh() 函数应定义为AgeCh()
Corrected code: 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>
解决方案2
0 2017-05-17 04:16:29
Seems to be an error with defining your function. 定义函数似乎是一个错误。 I redefined your function using the let AgeCh = function() {} and this seemed to get your function to work. 我使用let AgeCh = function() {}重新定义了您的函数，这似乎可以使您的函数正常工作。
https://plnkr.co/edit/rHBbofiwvO55bCLDA4jg?p=preview https://plnkr.co/edit/rHBbofiwvO55bCLDA4jg?p=preview
docs on functions: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions 函数文档： https : //developer.mozilla.org/zh-CN/docs/Web/JavaScript/Guide/Functions
解决方案3
0 2017-05-17 04:18:53
yes check your function declaration is wrong Its like 是的，请检查您的函数声明是否错误
function AgeCh
{
change to 改成
function AgeCh()
{
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