如何在点击时调用JavaScript函数？
要通过单击JavaScript中的按钮来调用函数，请使用onclick。尝试运行以下代码以在JavaScript中调用onclick函数-
示例
<html>
<head>
<script>
function sayHello() {
document.write ("你好！");
}
</script>
</head>
<body>
<p>Click the following button to call the function</p>
<form>
<input type = "button" onclick = "sayHello()" value = "Say Hello">
</form>
<p>Use different text in write method and then try...</p>
</body>
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