<!Doctype html>
<html xmlns="http://www./1999/xhtml">
<head>
<title>继承</title>
<script type="text/javascript">
/*
function Animal(){
this.s="animal"
}
function Cat(){
Animal.call(this)
this.name="cat"
}
var animal= new Animal()
var cat= new Cat()
alert(cat.s) //调动 Cat() ==> Animal.call(this) ==> this.s="animal"
*/
function Animal(){
Animal.prototype.s="animal"
}
function Cat(){
this.name="cat"
}
Cat.prototype=Animal.prototype
var animal= new Animal()
var cat= new Cat()
alert(cat.s)
</script>
</head>
<body>
</body>
</html>
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