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) {
		index_11_over = newImage("common_images/index_11-over.jpg");
		index_12_over = newImage("common_images/index_12-over.jpg");
		index_13_over = newImage("common_images/index_13-over.jpg");
		index_15_over = newImage("common_images/index_15-over.jpg");
		index_16_over = newImage("common_images/index_16-over.jpg");
		index_18_over = newImage("common_images/index_18-over.jpg");
		index_19_over = newImage("common_images/index_19-over.gif");
		index_20_over = newImage("common_images/index_20-over.jpg");
		index_21_over = newImage("common_images/index_21-over.jpg");
		index_22_over = newImage("common_images/index_22-over.jpg");
		preloadFlag = true;
	}
}
var preloadFlag = false;
function preloadImages1() {
	if (document.images) {
		top_03_over = newImage("common_images/top_03-over.gif");
		preloadFlag = true;
	}
}
var preloadFlag = false;
function preloadImages2() {
	if (document.images) {
		top_02_over = newImage("common_images/top2_02-over.gif");
		preloadFlag = true;
	}
}