Javascript : Dynamically Selecting a Method / Property

script.js

function MyClass(name) {
	this.name = name;
}

MyClass.prototype.say_hello = function() {
	alert(this.name);
}

MyClass.prototype.say_something = function(phrase) {
	this.name = phrase;
	this.say_hello();
}

var s = new MyClass("hello");

alert(s['name']);  				// property
s['say_hello']();  				// method
s['say_something']('bye'); 		// method with parameter

var flag = true;
s[flag ? 'say_hello' : 'say_hello']();