javascript当中Function用法

Function用法
马克- to-win：马克 java社区：防盗版实名手机尾号： 73203。
例 3.4.1

<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
</head>
<script>
    /*马克-to-win：When the Global object is created, it always has at least the following properties:
       Object object
       Function object
       Array object
       String object
       Boolean object
       Number object
       Date object
       Math object
       Value properties
   */

    /*Function的好处是， 函数体可以是运行时的一个传入的动态字符串，for the Function class, the last parameter is
    function body, while the parameters before the last one are input arguments., 'x' can be changed to "x" */
    var a='return x + y;';
    var f = new Function('x', 'y',a );// 等价于var f = function(x, y){return x + y;}
    document.write(f(1, 1));
</script>


输出结果：

2