var image1 = new Image();
image1.src = "../images/login_button_hover.png";
var image2 = new Image();
image2.src = "../images/signup_button_hover.png";
var image3 = new Image();
image3.src = "../images/scroller_rightarrow_hover.png";
var image4 = new Image();
image4.src = "../images/scroller_leftarrow_hover.png";