详细介绍javascript使用prototype实现OOP继承的方法

function Vegetable(){
	this.taste='delicious';
	
	this.fun1 = function(){
	alert('Vegetable fun1 doing...');
	}
}

function Celery(){
	this.color = 'green';	
	this.taste = 'bad';
	this.fun1 = function(){
	alert('Celeryfun1 doing...');
	}
	this.fun2 = function(){
	alert('Celery fun2 doing...');
	}	
}

Celery.prototype = new Vegetable();
var stick = new Celery();
var polymorphed = stick.taste;

alert(polymorphed);
alert(stick.color);

stick.fun1();
stick.fun2();