preload.js

var Preload = function(game) {
    this.game = game;    
};



Preload.prototype.preload = function() {

	/*
	Phaser.Loader.prototype.originalNextFile = Phaser.Loader.prototype.nextFile;
	Phaser.Loader.prototype.nextFile = function(previousIndex, success) {
	    var self = this;  
	    window.setTimeout(function() {
	        Phaser.Loader.prototype.originalNextFile.call(self, previousIndex, success);
	    }, 200);
	};
	*/ 

	this.text = game.add.text(16, 16, 'loading 0%');
    this.text.anchor.set(0);
    this.text.font = 'Arial';
    this.text.fontWeight = 'bold';
    this.text.fontSize = 24;
    this.text.fill = '#ffffff';
    this.text.alpha = 0.5;


	this.preloadBar = game.add.sprite(0, 0, null);
	this.preloadBar.alpha = 0.5;

	var preloadGraphic = game.add.graphics(0, 0);
  	preloadGraphic.lineStyle(10, 0xffffff, 1);
  	preloadGraphic.moveTo(0, 0);
  	preloadGraphic.lineTo(game.width, 0);
  	
  	this.preloadBar.addChild(preloadGraphic);
  	this.preloadBar.scale.x = 0; // set the bar to the beginning position
	
    game.load.onFileComplete.add(fileComplete, this);

    //game.load.image('nomad', 'assets/nomad2.png');
    game.load.image('head', 'assets/head.png');
    game.load.spritesheet('nomad', 'assets/nomad-strip.png?1',20,39);
    game.load.spritesheet('gibs', 'assets/gibs2.png',42,41);
    game.load.spritesheet('stars', 'assets/stars.png?1',20,20);
    game.load.audio('drums', 'assets/drums2.mp3');
    game.load.audio('kick', 'assets/kick.wav');
    game.load.audio('snare', 'assets/snare.wav');
    game.load.audio('splash', 'assets/splash.wav');
    game.load.audio('crash', 'assets/crash2.wav');
    game.load.audio('bgmusic', ['assets/wind2.mp3']);

};

function fileComplete() {
	//console.log("fileComplete", game.load.progress);
	this.preloadBar.scale.x = game.load.progress * 0.01;
	this.text.setText("loading "+game.load.progress+"%");
}

Preload.prototype.create = function() {

	game.state.start("Intro");

};

Preload.prototype.update = function() {
	console.log(game.load.progress);
};