继承的另一种写法

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>继承的另一种写法</title>

<script>

var Animal = function () {};



Animal.prototype.breath = function () {

    console.log('breath');

};



var Dog = function () {};



// Dog 继承了 Animal

Dog.prototype = new Animal;



Dog.prototype.wag = function () {

    console.log('wag tail');

};



var dog = new Dog;

dog.wag();

dog.breath();  // 继承的属性

</script>

</head>



<body>

</body>

</html>

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