var preloaded = new Array();
function preload_images() {
    for (var i = 0; i < arguments.length; i++){
        preloaded[i] = document.createElement(img);
        preloaded[i].setAttribute( isrc,arguments[i]);
    };
};
preload_images(
    /img/biography_hover.gif,
    /img/contact_hover.gif,
    /img/easel_hover.gif,
    /img/gallery_hover.gif,
    /img/info_hover.gif,
    /img/links_hover.gif,
    /img/prints_hover.gif
);