<!DOCTYPE html>
<html>
<body>
<h2>JavaScript 函数</h2>
<p>此例调用执行计算并返回结果的函数：</p>
<p id="demo"></p>
<script>
function myFunction(p1, p2) {
return p1 * p2;
}
document.getElementById("demo").innerHTML = myFunction(4, 3);
</script>
</body>
</html>