代码示例:(标识:eg_js_function)
<!DOCTYPE html>
<html>
<body>

<h2>JavaScript 函数</h2>

<p>本例调用了一个执行计算的函数,然后返回结果:</p>

<p id="demo"></p>

<script>
function myFunction(p1, p2) {
    return p1 * p2;
}
document.getElementById("demo").innerHTML = myFunction(7, 8);
</script>

</body>
</html>
运行结果: