javascript - How can I access the super of the super class in JS?

The code is pretty explanatory. What I am doing is wrong. How can I access the a property of the A object in the onclick event of an object declared inside of an A object method?

function A(){
    this.a = 0;
};
A.prototype.myfun= function(){
    var b = document.getElementsByClassName("myclassName");
    b[0].onclick = function(e){
    //How can I get the a property of the A object in here?
        this.a = 1;
    }
};

Could I somehow pass this as an argument like this?!

b[0].onclick = function(e, this){