var home_on=new Image();
home_on.src="./img/interface/navi_home_a.gif";
var home_off=new Image();
home_off.src="./img/interface/navi_home.gif";

var search_on=new Image();
search_on.src="./img/interface/navi_search_a.gif";
var search_off=new Image();
search_off.src="./img/interface/navi_search.gif";

var company_on=new Image();
company_on.src="./img/interface/navi_company_a.gif";
var company_off=new Image();
company_off.src="./img/interface/navi_company.gif";

var voice_on=new Image();
voice_on.src="./img/interface/navi_voice_a.gif";
var voice_off=new Image();
voice_off.src="./img/interface/navi_voice.gif";

var contact_on=new Image();
contact_on.src="./img/interface/navi_contact_a.gif";
var contact_off=new Image();
contact_off.src="./img/interface/navi_contact.gif";