function newImage(arg) {if (document.images) {rslt = new Image(); rslt.src = arg; return rslt;}}
function changeImages() {if (document.images){for (var i=0; i<changeImages.arguments.length; i+=2){document[changeImages.arguments[i]].src = changeImages.arguments[i+1];}}}

newImage('/images/main_nav-01.gif');
newImage('/images/main_nav-02.gif');
newImage('/images/main_nav-03.gif');
newImage('/images/main_nav-04.gif');
newImage('/images/main_nav-05.gif');
newImage('/images/main_nav-06.gif');
newImage('/images/main_nav-07.gif');
newImage('/images/main_nav_on-01.gif');
newImage('/images/main_nav_on-02.gif');
newImage('/images/main_nav_on-03.gif');
newImage('/images/main_nav_on-04.gif');
newImage('/images/main_nav_on-05.gif');
newImage('/images/main_nav_on-06.gif');
newImage('/images/main_nav_on-07.gif');
newImage('/images/rcol_bmx.gif');
newImage('/images/rcol_skate.gif');
newImage('/images/rcol_fmx.gif');
newImage('/images/rcol_inline.gif');
newImage('/images/rcol_bmx_on.gif');
newImage('/images/rcol_skate_on.gif');
newImage('/images/rcol_fmx_on.gif');
newImage('/images/rcol_inline_on.gif');
newImage('/images/asa_sites_on.gif');
newImage('/images/asa_sites.gif');