var IMAGE_PATHS = [];
IMAGE_PATHS[0] = "images/home.png";
IMAGE_PATHS[1] = "images/forum.png";
IMAGE_PATHS[2] = "images/home2.png";
IMAGE_PATHS[3] = "images/forum2.png";


var IMAGE_CACHE = [];

for (var i=0; i<IMAGE_PATHS.length; i++) 
{
 IMAGE_CACHE[i] = new Image();
 IMAGE_CACHE[i].src = IMAGE_PATHS[i];
}

function Swap(img, imgSrc) 
{
 img.src = imgSrc;
}