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) {

		header_03_over = newImage("images/header_03-over.jpg");

		header_05_over = newImage("images/header_05-over.jpg");

		koshinjoho_over = newImage("images/koshinjoho-over.gif");

		news_release_over = newImage("images/news-release-over.gif");

		ivent_over = newImage("images/ivent-over.jpg");

		mail_magagen_over = newImage("images/mail-magagen-over.jpg");

		katei_over = newImage("images/katei-over.jpg");

		color_center_over = newImage("images/color-center-over.jpg");

		kateiyou_over = newImage("images/kateiyou-over.jpg");



		preloadFlag = true;

	}

}