var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create, update: update });

function preload() {
    game.load.image('trsi', 'assets/pics/trsipic1_lazur.jpg');
}

var r;
var pic;

function create() {

    pic = game.add.sprite(0, 0, 'trsi');

    r = new Phaser.Rectangle(0, 0, 200, 200);

}

function update() {

    r.x = game.input.x;
    r.y = game.input.y;
    pic.x = game.input.x;
    pic.y = game.input.y;

    //  Apply the new crop Rectangle to the sprite
    pic.crop = r;

}