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) {
		page_4_08_over = newImage("image/page_4_08-over.gif");
		page_4_09_over = newImage("image/page_4_09-over.gif");
		page_4_10_over = newImage("image/page_4_10-over.gif");
		page_4_11_over = newImage("image/page_4_11-over.gif");
		page_4_13_over = newImage("image/page_4_13-over.gif");
		page_4_15_over = newImage("image/page_4_15-over.gif");
		page_4_16_over = newImage("image/page_4_16-over.gif");
		page_4_20_over = newImage("image/page_4_20-over.gif");
		left_title4_1_25_over = newImage("image/left_title4_1_25-over.gif");
		left_title4_2_25_over = newImage("image/left_title4_2_25-over.gif");
		left_title4_3_25_over = newImage("image/left_title4_3_25-over.gif");
		left_title4_4_25_over = newImage("image/left_title4_4_25-over.gif");
		left_title4_5_25_over = newImage("image/left_title4_5_25-over.gif");
		preloadFlag = true;
	}
}