input.js

InputEngineClass = Class.extend({

    	keyState: new Array(256),

	//-----------------------------
	setup: function () {
		document.getElementById('my_canvas').addEventListener('mousemove', this.onMouseMove);
		document.getElementById('my_canvas').addEventListener('keydown', this.onKeyDown);
        	document.getElementById('my_canvas').addEventListener('keyup', this.onKeyUp);	
	},

	//-----------------------------
	onMouseMove: function (event) {
		var posx = event.clientX;
		var posy = event.clientY;
	},

	//-----------------------------
	onKeyDown: function (event) {
	        var keyID = event.keyID;
	        this.keyState[keyID] = true;
	},

	//-----------------------------
	onKeyUp: function (event) {
		var keyID = event.keyID;
        	this.keyState[keyID] = false;
	},

	//-----------------------------
	update: function() {
		KeyW = 87;

		if(this.keyState[KeyW])
			console.log("FORWARD!!!");
	}
});

gInputEngine = new InputEngineClass();