#display_menu_1 .nav {background-color:transparent;}
#display_menu_1 .nav_hover {background-color:transparent;}
#display_menu_2 .nav {background-color:transparent;}
#display_menu_2 .nav_hover {background-color:transparent;}
#display_menu_3 .nav {background-color:transparent;}
#display_menu_3 .nav_hover {background-color:transparent;}