javascript学到了后面，我逐渐的了解到这两个方法所起的作用，比较大的地方就是应用在对象冒充实现构造函数继承中。<script type="text/javascript"> function Box(name, age){ this.name= name; this.age = age; this.family = ['哥哥','姐姐']; //引用类型，放在构造里面就不会被共享 } //Box.prototype.family = '家庭'; //不起作用 function Desk(name, age){ Box.call(this, name,age);//对象冒充，只能继承构造里的信息 } var desk = new Desk('caibaojian',27); alert(desk.family); desk.family.push('弟弟'); alert(desk.family); var desk2 = new Desk('jack',22); alert(desk2.family);</script>

<script type="text/javascript"> function Obj(){this.value="对象！";} var value="global 变量"; function Fun1(){alert(this.value);} window.Fun1(); //global 变量 Fun1.call(window); //global 变量 Fun1.call(document.getElementById('myText')); //input text Fun1.call(new Obj()); //对象！ </script> <input type="text" id="myText" value="input text">
<script type="text/javascript"> function Box(name, age){this.name= name;this.age = age;this.run = function(){return this.name+" is "+this.age +" year old";}};function SayBox() {	Box.apply(this,arguments);}var sayBox = new SayBox('caibaojian.com',2);alert(sayBox.run()); // caibaojian.com is 2 year old</script>