//---------------------------
//ロールオーバー
//---------------------------
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_menu_01_over = newImage("img/top_menu_01_over.gif");
		top_menu_06_over = newImage("img/top_menu_06_over.gif");
		top_menu_02_over = newImage("img/top_menu_02_over.gif");
		top_menu_08_over = newImage("img/top_menu_08_over.gif");
		top_menu_03_over = newImage("img/top_menu_03_over.gif");
		top_menu_09_over = newImage("img/top_menu_09_over.gif");
		top_menu_04_over = newImage("img/top_menu_04_over.gif");
		top_menu_10_over = newImage("img/top_menu_10_over.gif");
		
		header_home_over = newImage("img/header_home_over.gif");
		
		menu_01_over = newImage("img/menu_01_over.gif");
		menu_02_over = newImage("img/menu_02_over.gif");
		menu_03_over = newImage("img/menu_03_over.gif");
		menu_04_over = newImage("img/menu_04_over.gif");
		menu_05_over = newImage("img/menu_05_over.gif");
		menu_07_over = newImage("img/menu_07_over.gif");
		menu_08_over = newImage("img/menu_08_over.gif");
		menu_09_over = newImage("img/menu_09_over.gif");
		
		menu_sin_01_over = newImage("img/menu_sin_01_over.gif");
		menu_sin_02_over = newImage("img/menu_sin_02_over.gif");
		menu_sin_03_over = newImage("img/menu_sin_03_over.gif");
		menu_sin_04_over = newImage("img/menu_sin_04_over.gif");
		preloadFlag = true;
	}
}