javascript 入门学习1
对于Javascript，如果你学了Java，再学习javascript就很简单了。他们有很多的相似的地方。
注意观察！
下面举一个例子

下面是用json的语法格式

简单说一下json,它是一种轻量级的数据交换格式。
详情见 http://www.json.org/json-zh.html


//综合演示js中类和属性的动态添加var life = {};    for(life.age = 1; life.age <= 3; life.age++)    {        switch(life.age)        {            case 1: life.body = "卵细胞";                    life.say = function(){alert(this.age+this.body)};                    break;            case 2: life.tail = "尾巴";                    life.gill = "腮";                    life.body = "蝌蚪";                    life.say = function(){alert(this.age+this.body+"-"+this.tail+","+this.gill)};                    break;            case 3: delete life.tail;                    delete life.gill;                    life.legs = "四条腿";                    life.lung = "肺";                    life.body = "青蛙";                    life.say = function(){alert(this.age+this.body+"-"+this.legs+","+this.lung)};                    break;        };        life.say();    };