//マウスオーバー
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images ) {
		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) {
		gn_01 = newImage("/common/images/gn_01_ov.gif");
		gn_02 = newImage("/common/images/gn_02_ov.gif");
		gn_03 = newImage("/common/images/gn_03_ov.gif");
		gn_04 = newImage("/common/images/gn_04_ov.gif");
		gn_05 = newImage("/common/images/gn_05_ov.gif");
		gn_06 = newImage("/common/images/gn_06_ov.gif");
		preloadFlag = true;
	}
}