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) {
		top_03_over = newImage("../../images/top_03-over.gif");
		top_04_over = newImage("../../images/top_04-over.gif");
		top_05_over = newImage("../../images/top_05-over.gif");
		top_06_over = newImage("../../images/top_06-over.gif");
		top_07_over = newImage("../../images/top_07-over.gif");
		top_08_over = newImage("../../images/top_08-over.gif");
		top_09_over = newImage("../../images/top_09-over.gif");
		top_10_over = newImage("../../images/top_10-over.gif");
		top_11_over = newImage("../../images/top_11-over.gif");
		top_12_over = newImage("../../images/top_12-over.gif");
		main_16_over = newImage("../../images/main_16-over.gif");
		main_17_over = newImage("../../images/main_17-over.gif");
		main_18_over = newImage("../../images/main_18-over.gif");
		main_19_over = newImage("../../images/main_19-over.gif");
		main_20_over = newImage("../../images/main_20-over.gif");
		main_21_over = newImage("../../images/main_21-over.gif");
		preloadFlag = true;
	}
}