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_products_on=new Image();
navi_btn_products_on.src="./img/interface/navi_btn_products_a.gif";
var navi_btn_products_off=new Image();
navi_btn_products_off.src="./img/interface/navi_btn_products.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_recruit_on=new Image();
navi_btn_recruit_on.src="./img/interface/navi_btn_recruit_a.gif";
var navi_btn_recruit_off=new Image();
navi_btn_recruit_off.src="./img/interface/navi_btn_recruit.gif";

var navi_btn_newsrelease_on=new Image();
navi_btn_newsrelease_on.src="./img/interface/navi_btn_newsrelease_a.gif";
var navi_btn_newsrelease_off=new Image();
navi_btn_newsrelease_off.src="./img/interface/navi_btn_newsrelease.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";