//マウスオーバー処理
if(document.images){
	img_data = new Array(
/* 0 */		"top_navi01",
/* 1 */		"top_navi02",
/* 2 */		"top_navi03",
/* 3 */		"top_navi04"
	);

	img_on   = new Array();
	img_off  = new Array();

//プレロードスクリプト
	for(i in img_data){
	img_on[i] = new Image();
	img_on[i].src = "/images/" + img_data[i] + "_on.gif";
	img_off[i] = new Image();
	img_off[i].src = "/images/" + img_data[i] + "_off.gif";
	}
}

//オンマウス画像の切り替え
function offimage(i) {
	if (document.images) {
		document.images["img" + i].src = img_off[i].src;
	}
}

function onimage(i) {
	if (document.images) {
		document.images["img" + i].src = img_on[i].src;
	}
}