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) {
		language_over = newImage("./images/language_over.gif");
		c01_over = newImage("./images/c01_over.gif");
		c02_over = newImage("./images/c02_over.gif");
		c03_over = newImage("./images/c03_over.gif");
		c04_over = newImage("./images/c04_over.gif");
		c05_over = newImage("./images/c05_over.gif");
		c06_over = newImage("./images/c06_over.gif");
		b01_over = newImage("./images/b01_over.gif");
		b02_over = newImage("./images/b02_over.gif");
		b03_over = newImage("./images/b03_over.gif");
		b04_over = newImage("./images/b04_over.gif");
		b05_over = newImage("./images/b05_over.gif");
		b06_over = newImage("./images/b06_over.gif");
		b07_over = newImage("./images/b07_over.gif");
		b08_over = newImage("./images/b08_over.gif");
		b09_over = newImage("./images/b09_over.gif");
		b10_over = newImage("./images/b10_over.gif");
		b11_over = newImage("./images/b11_over.gif");
		b12_over = newImage("./images/b12_over.gif");
		icon_01_over = newImage("./images/icon_01_over.gif");
		icon_02_over = newImage("./images/icon_02_over.gif");
		icon_03_over = newImage("./images/icon_03_over.gif");
		icon_04_over = newImage("./images/icon_04_over.gif");
		n01_over = newImage("./images/n01_over.gif");
		n02_over = newImage("./images/n02_over.gif");
		n03_over = newImage("./images/n03_over.gif");
		map_over = newImage("./images/map_over.gif");
		preloadFlag = true;
	}
}