/**
 * common page load
 */
var preloadFlag = false;

preloadImages();

// End Main *******

/**
 * create and load a new image
 */
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

/**
 * image rollover
 */
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];
		}
	}
}

/**
 * pre-load menu images
 */
function preloadImages() {
	if (document.images) {
		menu_02_over = newImage('images/menu_02_over.gif');
		menu_04_over = newImage('images/menu_04_over.gif');
		menu_06_over = newImage('images/menu_06_over.gif');
		menu_08_over = newImage('images/menu_08_over.gif');
		menu_10_over = newImage('images/menu_10_over.gif');
		menu_left_02_over = newImage('images/menu_left_02_over.gif');
		footer_02_over = newImage('images/footer_02_over.gif');
		footer_04_over = newImage('images/footer_04_over.gif');
		footer_06_over = newImage('images/footer_06_over.gif');
		preloadFlag = true;
	}
}