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) {
n_bio_o = newImage("images/n_bio_o.gif");
n_audio_o = newImage("images/n_audio_o.gif");
n_clients_o = newImage("images/n_clients_o.gif");
n_slideshow_o = newImage("images/n_slideshow_o.gif");
n_events_o = newImage("images/n_events_o.gif");
n_contact_o = newImage("images/n_contact_o.gif");
n_home_o = newImage("images/n_home_o.gif");
preloadFlag = true;
}
}