function preload() {
(new Image()).src="/images/menu/btn_01_over.gif";
(new Image()).src="/images/menu/btn_02_over.gif";
(new Image()).src="/images/menu/btn_03_over.gif";
(new Image()).src="/images/menu/btn_04_over.gif";
(new Image()).src="/images/menu/btn_05_over.gif";
(new Image()).src="/images/menu/btn_06_over.gif";
(new Image()).src="/images/menu/btn_07_over.gif"; 
(new Image()).src="/images/menu/btn_08_over.gif"; 
(new Image()).src="/images/menu/btn_09_over.gif"; 

(new Image()).src="/images/news_btn/subnavi_btn_01_active.gif"; 
(new Image()).src="/images/news_btn/subnavi_btn_02_active.gif"; 
(new Image()).src="/images/news_btn/subnavi_btn_03_active.gif";
(new Image()).src="/images/news_btn/subnavi_btn_04_active.gif"; 
(new Image()).src="/images/news_btn/subnavi_btn_05_active.gif";

(new Image()).src="/images/news_btn/subnavi_btn_01_over.gif";
(new Image()).src="/images/news_btn/subnavi_btn_02_over.gif";
(new Image()).src="/images/news_btn/subnavi_btn_03_over.gif";
(new Image()).src="/images/news_btn/subnavi_btn_04_over.gif";
(new Image()).src="/images/news_btn/subnavi_btn_05_over.gif";

(new Image()).src="/images/news_btn/more_hover.gif";
}