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) {
		id01news_over = newImage("img/01news_over.gif");
		id02about_over = newImage("img/02about_over.gif");
		id03events_over = newImage("img/03events_over.gif");
		id04awards_over = newImage("img/04awards_over.gif");
		id05activities_over = newImage("img/05activities_over.gif");
		id06jrsj_over = newImage("img/06jrsj_over.gif");
		id07ar_over = newImage("img/07ar_over.gif");
		id08member_over = newImage("img/08member_over.gif");
		preloadFlag = true;
	}
}