imgdata_off = new Array("images/bt_kaiin.jpg","images/bt_dezain.jpg","images/bt_hojin.jpg","images/bt_kashinushi.jpg","images/bt_nyuukyosya.jpg","images/bt_ona.jpg","images/bt_kaisya.jpg","images/bt_otoi.jpg","images/bt_mail.gif");
	img_data_on = new Array("images/bt_kaiin+.jpg","images/bt_dezain+.jpg","images/bt_hojin+.jpg","images/bt_kashinushi+.jpg","images/bt_nyuukyosya+.jpg","images/bt_ona+.jpg","images/bt_kaisya+.jpg","images/bt_otoi+.jpg","images/bt_mail+.gif");

	preimg_off = new Array();
	preimg_on = new Array();

	for(j=0;j<imgdata_off.length;j++){
		preimg_off[j] = new Image();
		preimg_off[j].src = imgdata_off[j];
		preimg_on[j] = new Image();
		preimg_on[j].src = img_data_on[j];
	}