addEvent(window,"load",function(){
(new Image()).src="../images/menu/menu_btn_01_hover.gif";
(new Image()).src="../images/menu/menu_btn_02_hover.gif";
(new Image()).src="../images/menu/menu_btn_03_hover.gif";
(new Image()).src="../images/menu/menu_btn_04_hover.gif";
(new Image()).src="../images/menu/menu_btn_05_hover.gif";
(new Image()).src="../images/menu/menu_btn_06_hover.gif";
(new Image()).src="../images/menu/menu_btn_01_active.gif";
(new Image()).src="../images/menu/menu_btn_02_active.gif";
(new Image()).src="../images/menu/menu_btn_03_active.gif";
(new Image()).src="../images/menu/menu_btn_04_active.gif";
(new Image()).src="../images/menu/menu_btn_05_active.gif";
(new Image()).src="../images/menu/menu_btn_06_active.gif";
(new Image()).src="../images/btn/btn_page_top_hover.gif";
});