function preload() {
var image1 = new Image;
image1.src = "../images/topnav/home_alt.png";
var image2 = new Image;
image2.src = "../images/topnav/about_alt.png";
var image3 = new Image;
image3.src = "../images/topnav/portfolio_alt.png";
var image4 = new Image;
image4.src = "../images/topnav/design_alt.png";
var image5 = new Image;
image5.src = "../images/topnav/contact_alt.png";
}
addLoadEvent(preload);