var ButtonSignUp = {
	init: function(){
		var button_signup = document.getElementById("button-signup");
        if(button_signup){
            Core.addEventListener(button_signup, "mouseover", ButtonSignUp.mouseoverListener);
            Core.addEventListener(button_signup, "mouseout", ButtonSignUp.mouseoutListener);
        }
	},
	mouseoverListener: function(){
        var button_signup = document.getElementById("button-signup");
		button_signup.setAttribute("src", "images/button-signup-hover.jpg");
    },
    mouseoutListener: function(){
        var button_signup = document.getElementById("button-signup");
		button_signup.setAttribute("src", "images/button-signup.jpg");
    }
}; Core.start(ButtonSignUp);