gistfile1.js

function CollisionContoller(width, height) {
    this.draw = function(){
        document.write("drawing\n");
    };
};


CollisionContoller.prototype.registerPlanet = function(image, position, type){
    this.draw();
}

collisionContoller = new CollisionContoller(480, 320);
    
collisionContoller.registerPlanet(null, {x:240, y:160}, 0);