if (document.images) {

        preload02on = new Image(); preload02on.src="/img/layouts/header/logo_hover.png";
        preload03on = new Image(); preload03on.src="/img/layouts/header/bg_hover.gif";
        preload04on = new Image(); preload04on.src="/img/layout/left/nav_hover.gif.gif";
        
 }