// array of images   
var swapImgs = new Array(5); 
	swapImgs[0] = "./images/nav2a.jpg";
  swapImgs[1] = "./images/nav3a.jpg"; 
  swapImgs[2] = "./images/nav4a.jpg"; 
  swapImgs[3] = "./images/nav5a.jpg"; 
  swapImgs[4] = "./images/nav6a.jpg";

// preload the images 
function preload() { 
	var tmp = null; 
  for (var j = 0; j < swapImgs.length; j++) { 
    tmp = swapImgs[j]; 
    swapImgs[j] = new Image(); 
    swapImgs[j].src = tmp; 
  } 
}