function preloadImg(arg) {
    if (document.images) {
        rslt = new Image();
        rslt.src = arg;
    }
}

function toogleClass(objID,newClass)
{
	objID.className = objID.id+newClass;
}

function imgSwap(obj, imgFile) {
    obj.src = "images/" + imgFile;
}

preloadImg("images/wideGregorianBC_background.jpg");
preloadImg("images/RedGregorianBC_Logo.png");
preloadImg("images/home_up.png");
preloadImg("images/home_dwn.png");
preloadImg("images/news_up.png");
preloadImg("images/news_dwn.png");
preloadImg("images/bio_up.png");
preloadImg("images/bio_dwn.png");
preloadImg("images/visuals_up.png");
preloadImg("images/visuals_dwn.png");
preloadImg("images/music_up.png");
preloadImg("images/music_dwn.png");
preloadImg("images/shop_up.png");
preloadImg("images/shop_dwn.png");
preloadImg("images/blog_up.png");
preloadImg("images/blog_dwn.png");