function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
        if (document.images) {
//      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) {
                xbtn_buy = newImage("images/btn_buy_on.jpg");
                xbtn_join = newImage("images/btn_join_on.jpg");
                xbtn_email = newImage("images/btn_email_on.jpg");
                xnav_news = newImage("images/nav_news_on.jpg");
                xnav_gigs = newImage("images/nav_gigs_on.jpg");
                xnav_music = newImage("images/nav_music_on.jpg");
                xnav_lyrics = newImage("images/nav_lyrics_on.jpg");
                xnav_photos = newImage("images/nav_photos_on.jpg");
                xnav_bio = newImage("images/nav_bio_on.jpg");
                xnav_press = newImage("images/nav_press_on.jpg");
                preloadFlag = true;
        }
}