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

var navi_about_on=new Image();
navi_about_on.src="img/interface/navi_about_a.gif";
var navi_about_off=new Image();
navi_about_off.src="img/interface/navi_about.gif";

var navi_seminar_on=new Image();
navi_seminar_on.src="img/interface/navi_seminar_a.gif";
var navi_seminar_off=new Image();
navi_seminar_off.src="img/interface/navi_seminar.gif";

var navi_csr_on=new Image();
navi_csr_on.src="img/interface/navi_csr_a.gif";
var navi_csr_off=new Image();
navi_csr_off.src="img/interface/navi_csr.gif";

var navi_enter_on=new Image();
navi_enter_on.src="img/interface/navi_enter_a.gif";
var navi_enter_off=new Image();
navi_enter_off.src="img/interface/navi_enter.gif";

var navi_album_on=new Image();
navi_album_on.src="img/interface/navi_album_a.gif";
var navi_album_off=new Image();
navi_album_off.src="img/interface/navi_album.gif";