<html>
<body>
<script>
function animal(kane){
this.kane:"aaaaa";
}
function Rabbit(name) {
this.name = name;
}
Rabbit.prototype.__proto__=animal.prototype;
var a=new animal("aaaa");// this wont work when i put a alert box
var rabbit = new Rabbit('John');
alert( rabbit.kane );// i should get aaaa but i am getting undefined
</script>
</body>
</html>
i should get aaaa in the alert box but how can i do a prototypical inheritance in this situation WHEN TO USE animal.prototype and when to use new animal()
kane:"aaaaa";
incorrect syntax here , it should be this.kane = "aaaaa";
now for Rabbit instances to get the property kane,you can use constructor stealing like
function Rabbit(name) {
animal.call(this); // constructor stealing
this.name = name;
}
Another approach would be
var a=new animal("aaaa");
var rabbit = Object.create(a);
in this approach constructor stealing is not required since your directly inheriting from an instance of animal