比如，我们定义了一个Classroom对象，这里我们定一个事件，当教室里的人增加超60人时就触发一个事件onFull;具体定义如下： 复制代码 代码如下:var Classroom=function() { this.numberOfPeople=0; this.onFull=null; this.peopleEnter=function(number) { this.numberOfPeople+=number; if(this.numberOfPeople>60&&this.onFull!=null) { this.onFull(this.numberOfPeople); } } } function show1(number) { alert("教室里有"+number+"人"); } function show2(number) { alert("教室里超出了"+(number-60)+"人"); } var classroom1=new Classroom(); classroom1.onFull=show1; classroom1.peopleEnter(30); classroom1.peopleEnter(32); classroom1.onFull=show2; classroom1.peopleEnter(34);

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本文标题：JavaScript 事件对象的实现

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