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) {
		navtemp_01_over = newImage("images/navtemp_01-over.gif");
		navtemp_02_over = newImage("images/navtemp_02-over.gif");
		navtemp_03_over = newImage("images/navtemp_03-over.gif");
		navtemp_05_over = newImage("images/navtemp_05-over.gif");
		navtemp_06_over = newImage("images/navtemp_06-over.gif");
		navtemp_07_over = newImage("images/navtemp_07-over.gif");
		navtemp_08_over = newImage("images/navtemp_08-over.gif");
		navtemp_04_over = newImage("images/navtemp_04-over.gif");
		preloadFlag = true;
	}
}