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) {
		biography_over = newImage("images/biography-over.gif");
		music_over = newImage("images/music-over.gif");
		tour_dates_over = newImage("images/tour-dates-over.gif");
		message_board_over = newImage("images/message-board-over.gif");
		photo_gallery_over = newImage("images/photo-gallery-over.gif");
		preloadFlag = true;
	}
}

function openWindow(url){
	window.open(url,"","height=400,width=495,left=140,top=40,screenX=140,screenY=40,scrollbars=1'");
}

function openImage(url,w,h){
 var dim = eval('"width=' + w + ',height=' + h + ',toolbar=0, location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0"');
 window.open(url,"instruct",dim);
}