var navi_btn_home_on=new Image();
navi_btn_home_on.src="../img/interface/navi_btn_home_a.gif";
var navi_btn_home_off=new Image();
navi_btn_home_off.src="../img/interface/navi_btn_home.gif";

var navi_btn_service_on=new Image();
navi_btn_service_on.src="../img/interface/navi_btn_service_a.gif";
var navi_btn_service_off=new Image();
navi_btn_service_off.src="../img/interface/navi_btn_service.gif";

var navi_btn_staff_on=new Image();
navi_btn_staff_on.src="../img/interface/navi_btn_staff_a.gif";
var navi_btn_staff_off=new Image();
navi_btn_staff_off.src="../img/interface/navi_btn_staff.gif";

var navi_btn_company_on=new Image();
navi_btn_company_on.src="../img/interface/navi_btn_company_a.gif";
var navi_btn_company_off=new Image();
navi_btn_company_off.src="../img/interface/navi_btn_company.gif";

var navi_btn_area_on=new Image();
navi_btn_area_on.src="../img/interface/navi_btn_area_a.gif";
var navi_btn_area_off=new Image();
navi_btn_area_off.src="../img/interface/navi_btn_area.gif";

var navi_btn_contact_on=new Image();
navi_btn_contact_on.src="../img/interface/navi_btn_contact_a.gif";
var navi_btn_contact_off=new Image();
navi_btn_contact_off.src="../img/interface/navi_btn_contact.gif";