/*toppre*/
site_on = new Image () ;
site_on.src = "head_imgs/sitemap_b2.jpg";

top_on = new Image () ;
top_on.src = "head_imgs/top_b2.jpg";

kakushu_on = new Image () ;
kakushu_on.src = "head_imgs/kakushu_b2.jpg";

roudou_on = new Image () ;
roudou_on.src = "head_imgs/roudou_b2.jpg";

qaa_on = new Image () ;
qaa_on.src = "head_imgs/q_a_b2.jpg";

/*mainpre*/
topb_on = new Image () ;
topb_on.src = "base_imgs/top_b2.jpg";

saishin_on = new Image () ;
saishin_on.src = "base_imgs/saishin_b2.jpg";

daigaku_on = new Image () ;
daigaku_on.src = "base_imgs/daigaku_b2.jpg";

koukou_on = new Image () ;
koukou_on.src = "base_imgs/koukou_b2.jpg";

jakunen_on = new Image () ;
jakunen_on.src = "base_imgs/gyomu_b2.jpg";

zenkoku_on = new Image () ;
zenkoku_on.src = "base_imgs/zenkoku_b2.jpg";

sanka_on = new Image () ;
sanka_on.src = "base_imgs/sanka_b2.jpg";

toukei_on = new Image () ;
toukei_on.src = "base_imgs/toukei_b2.jpg";