js创建对象的几种常用方式小结(推荐)

var lev=function(){
return "武林网";
};
function Parent(){
var Child = new Object();
Child.name="脚本";
Child.age="4";
Child.lev=lev;
return Child;
};
var x = Parent();
alert(x.name);
alert(x.lev());

var lev=function(){
return "武林网";
};
function Parent(){
this.name="脚本";
this.age="30";
this.lev=lev;
};
var x =new Parent();
alert(x.name);
alert(x.lev());

var lev=function(){
return "武林网";
};
function Parent(){

};
Parent.prototype.name="李小龙";
Parent.prototype.age="30";
Parent.prototype.lev=lev;
var x =new Parent();
alert(x.name);
alert(x.lev());

function Parent(){
this.name="脚本";
this.age=4;
};
Parent.prototype.lev=function(){
return this.name;
};;
var x =new Parent();
alert(x.lev());

function Parent(){
this.name="脚本";
this.age=4;

if(typeof Parent._lev=="undefined"){

Parent.prototype.lev=function(){
return this.name;
}
Parent._lev=true;
}
};

var x =new Parent();
alert(x.lev());

if(typeof Parent._lev=="undefined"){

Parent._lev=true;}