if (document.images) {
	sightseeing_button_normal = new Image (123,16)
	sightseeing_button_normal.src = "navbut/gr_2.gif"
	sightseeing_button_over = new Image (123,16)
	sightseeing_button_over.src = "navbut/gr_2_on.gif"
	events_button_normal = new Image (123,16)
	events_button_normal.src = "navbut/gr_3.gif"
	events_button_over = new Image (123,16)
	events_button_over.src = "navbut/gr_3_on.gif"
	arts_button_normal = new Image (123,16)
	arts_button_normal.src = "navbut/gr_4.gif"
	arts_button_over = new Image (123,16)
	arts_button_over.src = "navbut/gr_4_on.gif"
	hotels_button_normal = new Image (123,16)
	hotels_button_normal.src = "navbut/gr_5.gif"
	hotels_button_over = new Image (123,16)
	hotels_button_over.src = "navbut/gr_5_on.gif"
	travel_button_normal = new Image (123,16)
	travel_button_normal.src = "navbut/gr_6.gif"
	travel_button_over = new Image (123,16)
	travel_button_over.src = "navbut/gr_6_on.gif"
	cruises_button_normal = new Image (123,16)
	cruises_button_normal.src = "navbut/gr_22.gif"
	cruises_button_over = new Image (123,16)
	cruises_button_over.src = "navbut/gr_22_on.gif"
	rent_button_normal = new Image (123,16)
	rent_button_normal.src = "navbut/gr_7.gif"
	rent_button_over = new Image (123,16)
	rent_button_over.src = "navbut/gr_7_on.gif"
	restaurants_button_normal = new Image (123,16)
	restaurants_button_normal.src = "navbut/gr_8.gif"
	restaurants_button_over = new Image (123,16)
	restaurants_button_over.src = "navbut/gr_8_on.gif"
	clubs_button_normal = new Image (123,16)
	clubs_button_normal.src = "navbut/gr_9.gif"
	clubs_button_over = new Image (123,16)
	clubs_button_over.src = "navbut/gr_9_on.gif"
	shopping_button_normal = new Image (123,16)
	shopping_button_normal.src = "navbut/gr_10.gif"
	shopping_button_over = new Image (123,16)
	shopping_button_over.src = "navbut/gr_10_on.gif"
	confcenters_button_normal = new Image (123,16)
	confcenters_button_normal.src = "navbut/gr_12.gif"
	confcenters_button_over = new Image (123,16)
	confcenters_button_over.src = "navbut/gr_12_on.gif"
	confserv_button_normal = new Image (123,16)
	confserv_button_normal.src = "navbut/gr_13.gif"
	confserv_button_over = new Image (123,16)
	confserv_button_over.src = "navbut/gr_13_on.gif"
	transport_button_normal = new Image (123,16)
	transport_button_normal.src = "navbut/gr_15.gif"
	transport_button_over = new Image (123,16)
	transport_button_over.src = "navbut/gr_15_on.gif"
	financial_button_normal = new Image (123,16)
	financial_button_normal.src = "navbut/gr_16.gif"
	financial_button_over = new Image (123,16)
	financial_button_over.src = "navbut/gr_16_on.gif"
	education_button_normal = new Image (123,16)
	education_button_normal.src = "navbut/gr_17.gif"
	education_button_over = new Image (123,16)
	education_button_over.src = "navbut/gr_17_on.gif"
	health_button_normal = new Image (123,16)
	health_button_normal.src = "navbut/gr_18.gif"
	health_button_over = new Image (123,16)
	health_button_over.src = "navbut/gr_18_on.gif"
	sports_button_normal = new Image (123,16)
	sports_button_normal.src = "navbut/gr_19.gif"
	sports_button_over = new Image (123,16)
	sports_button_over.src = "navbut/gr_19_on.gif"
	info_button_normal = new Image (123,16)
	info_button_normal.src = "navbut/gr_20.gif"
	info_button_over = new Image (123,16)
	info_button_over.src = "navbut/gr_20_on.gif"
	companies_button_normal = new Image (123,16)
	companies_button_normal.src = "navbut/gr_23.gif"
	companies_button_over = new Image (123,16)
	companies_button_over.src = "navbut/gr_23_on.gif"

	acropolis_button_normal = new Image (114,16)
	acropolis_button_normal.src = "navbut/gr_b.gif"
	acropolis_button_over = new Image (114,16)
	acropolis_button_over.src = "navbut/gr_b_on.gif"
	nationalmuseum_button_normal = new Image (114,16)
	nationalmuseum_button_normal.src = "navbut/gr_c.gif"
	nationalmuseum_button_over = new Image (114,16)
	nationalmuseum_button_over.src = "navbut/gr_c_on.gif"
	parliament_button_normal = new Image (114,16)
	parliament_button_normal.src = "navbut/gr_d.gif"
	parliament_button_over = new Image (114,16)
	parliament_button_over.src = "navbut/gr_d_on.gif"
	lycabetus_button_normal = new Image (114,16)
	lycabetus_button_normal.src = "navbut/gr_e.gif"
	lycabetus_button_over = new Image (114,16)
	lycabetus_button_over.src = "navbut/gr_e_on.gif"
	byzantine_button_normal = new Image (114,16)
	byzantine_button_normal.src = "navbut/gr_f.gif"
	byzantine_button_over = new Image (114,16)
	byzantine_button_over.src = "navbut/gr_f_on.gif"
	minitrips_button_normal = new Image (114,16)
	minitrips_button_normal.src = "navbut/gr_g.gif"
	minitrips_button_over = new Image (114,16)
	minitrips_button_over.src = "navbut/gr_g_on.gif"
	airport_button_normal = new Image (114,16)
	airport_button_normal.src = "navbut/gr_h.gif"
	airport_button_over = new Image (114,16)
	airport_button_over.src = "navbut/gr_h_on.gif"
}