var sRootImgPath = "/_images/"

function mouseRollOver(oNav, sStatus) {
   oNav.src = sRootImgPath + oNav.id + sStatus + ".gif";
}


var preloaded = new Array();
function preload_images() {
    for (var i = 0; i < arguments.length; i++){
        preloaded[i] = document.createElement('img');
        preloaded[i].setAttribute('src',arguments[i]);
    };
};
preload_images(
    sRootImgPath + "Arch-On.gif",
    sRootImgPath + "Art-On.gif",
    sRootImgPath + "Earth-On.gif",
    sRootImgPath + "SideNavShape-Home-On.gif",
    sRootImgPath + "SideNavShape-Architecture-On.gif",
    sRootImgPath + "SideNavShape-Art-On.gif",
    sRootImgPath + "SideNavShape-Earth-On.gif"
);