[杂七杂八] 《悟透javascript》摘抄 1.0

<script>    var life={}//光溜溜的生命对象    for(life.age=1;life.age<=3;life.age++){        switch (life.age){            case 1:                life.body="卵细胞";//增加body属性                life.say=function(){alert(this.age+this.body)};//新建say方法                break;            case 2:                life.tail="尾巴";//增加tail属性                life.gill="鳃";//增加鳃属性                life.body="蝌蚪";                life.say=function(){alert(this.age+this.body+"-"+this.tail+" ,"+this.gill)};                break;            case 3:                delete life.tail;//删除tail属性                delete life.gill;                life.legs="四条腿";//增加legs属性                life.lung="肺";//增加肺属性                life.body="青蛙";                life.say=function(){alert(this.age+this.body+"-"+this.legs+" ,"+this.lung)};                break;        }    };    life.say();</script>