"Static" methods in javascript

static.js

// To be run under NodeJS
var util = require('util');

function Parent() {}
Parent.tableName = 'parentTable';
Parent.prototype.static_method = function() {
    return this.constructor.tableName;
}

function Child() {}
Child.tableName = 'childTable';
util.inherits(Child, Parent);
// Internally this does:
// Child.super_ = Parent;
// Child.prototype = Object.create(Parent.prototype, {
// constructor: { value: Child, enumerable: false }
// });

var p = new Parent();
var c = new Child();

/*** Static Method called properly ***/
console.log(Parent.prototype.static_method()); // => parentTable
console.log(Child.prototype.static_method()); // => childTable

/*** Static Method called "wrongly" ***/
console.log(p.static_method()); // => parentTable
console.log(c.static_method()); // => childTable