jquery class inheritance

Question

var A=function(){
};

$.extend(A.prototype, {
    init:function(){
        alert(\'A init\');
    }
});
var B=function(){

};

$.extend(B.prototype,A.prototype,{
            


        

Answer 1

How to invoke parent's methods:

var B=function(){
    A.call(this);
};

$.extend(B.prototype,A.prototype,{
        init:function(){
                A.prototype.init.call(this);
                alert('B init');
        }
});