//preload
var nav1 = new Image();
nav1.src = 'images/pageElements/welcome.png';
var nav2 = new Image();
nav2.src = 'images/pageElements/welcome_on.png';
var nav3 = new Image();
nav3.src = 'images/pageElements/nav/nav3.jpg';
var nav4 = new Image();
nav3.src = 'images/pageElements/nav/nav4.jpg';
var nav5 = new Image();
nav5.src = 'images/pageElements/nav/nav5.jpg';
var nav6 = new Image();
nav6.src = 'images/pageElements/nav/nav6.jpg';
var nav7 = new Image();
nav7.src = 'images/pageElements/nav/nav7.jpg';