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) {
menu_2_01_over = newImage("new_images/left_menu/001bunjyou-over.gif");
		menu_2_02_over = newImage("new_images/left_menu/014semi-over.gif");
		menu_2_03_over = newImage("new_images/left_menu/002tochi-over.gif");
		menu_2_04_over = newImage("new_images/left_menu/013sekourei-over.gif");
		menu_2_05_over = newImage("new_images/left_menu/003gobaikyaku-over.gif");
		menu_2_06_over = newImage("new_images/left_menu/004event-over.gif");
		menu_2_07_over = newImage("new_images/left_menu/005info-over.gif");
		menu_2_08_over = newImage("new_images/left_menu/012stuff-over.gif");
		menu_2_09_over = newImage("new_images/left_menu/006sikin-over.gif");
		menu_2_10_over = newImage("new_images/left_menu/007kaisya-over.gif");
		menu_2_11_over = newImage("new_images/left_menu/008kyujin-over.gif");
		menu_2_12_over = newImage("new_images/left_menu/009privacy-over.gif");
		menu_2_13_over = newImage("new_images/left_menu/010link-over.gif");
		menu_2_14_over = newImage("new_images/left_menu/011sitemap-over.gif");
		preloadFlag = true;
	}
}