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_5_08_over = newImage("image/page_5_08-over.gif");
		page_5_09_over = newImage("image/page_5_09-over.gif");
		page_5_10_over = newImage("image/page_5_10-over.gif");
		page_5_11_over = newImage("image/page_5_11-over.gif");
		page_5_12_over = newImage("image/page_5_12-over.gif");
		page_5_14_over = newImage("image/page_5_14-over.gif");	
		page_5_15_over = newImage("image/page_5_15-over.gif");
		page_5_16_over = newImage("image/page_5_16-over.gif");
		page_5_20_over = newImage("image/page_5_20-over.gif");	
		left_title5_1_25_over = newImage("image/left_title5_1_25-over.gif");
		preloadFlag = true;
	}
}