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

btn_disco = newImage("img/btn_disco_on.gif");
btn_pro = newImage("img/btn_pro_on.gif");
btn_info = newImage("img/btn_info_on.gif");

btn_audio = newImage("img/btn_audio_on.gif");
btn_cmnt = newImage("img/btn_cmnt_on.gif");

preloadFlag = true;}}preloadImages();