html运行实例（eg_js_function_constructor

代码示例：（标识：eg_js_function_constructor_1）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 函数</h1>

<p>JavaScript 有一个内置的函数构造函数。</p>

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

<script>
var myFunction = new Function("a", "b", "return a * b");
document.getElementById("demo").innerHTML = myFunction(4, 3);
</script>

</body>
</html>