How to implement this feature in javascript ? Make uncertain , divorce, the wife say!

Question

In the Javascript, could I define a class, the class itself can also when a function call, similar to the index, such as:

function A()
{
}

var a=new A();
var v=a();       //Use ordinary/like Javascript function use

Answer 1

This is a abuse of the constructor function syntax (it will work without the new)

function A(message) 
{   
  return function(){alert("Make " + message);}
}

var a = new A("uncertain, divorce the wife say");
var v = a(); //Use ordinary/like Javascript function use

Answer 2

No,This instance "a" has no object "A" prototype

a instanceof A===false