if (parseInt(navigator.appVersion.substring(0,1))>=3) { // 3.0 or greater.

enter_on = new Image();
enter_off = new Image();
enter_off.src = 'images_base/nav_inter_off.jpg';
enter_on.src = 'images_base/nav_inter_on.jpg';

north_on = new Image();
north_off = new Image();
north_off.src = 'images_base/nav_north_off.jpg';
north_on.src = 'images_base/nav_north_on.jpg';

enter_on = new Image();
enter_off = new Image();
enter_off.src = 'images_base/nav_inter_off.jpg';
enter_on.src = 'images_base/nav_inter_on.jpg';

north_on = new Image();
north_off = new Image();
north_off.src = 'images_base/nav_north_off.jpg';
north_on.src = 'images_base/nav_north_on.jpg';

home_on = new Image();
home_off = new Image();
home_off.src = '../images_base/nav_home_off.jpg';
home_on.src = '../images_base/nav_home_on.jpg';

homein_on = new Image();
homein_off = new Image();
homein_off.src = '../images_base/header_nav_in_1_off.jpg';
homein_on.src = '../images_base/header_nav_in_1_on.jpg';

obs_on = new Image();
obs_off = new Image();
obs_off.src = '../images_base/product_obs_home_off.jpg';
obs_on.src = '../images_base/product_obs_home_on.jpg';

nav_on = new Image();
nav_off = new Image();
nav_off.src = '../images_base/product_nav_home_off.jpg';
nav_on.src = '../images_base/product_nav_home_on.jpg';

rec_on = new Image();
rec_off = new Image();
rec_off.src = '../images_base/product_rec_home_off.jpg';
rec_on.src = '../images_base/product_rec_home_on.jpg';

mon_on = new Image();
mon_off = new Image();
mon_off.src = '../images_base/product_mon_home_off.jpg';
mon_on.src = '../images_base/product_mon_home_on.jpg';

trans_on = new Image();
trans_off = new Image();
trans_off.src = '../images_base/product_trans_home_off.jpg';
trans_on.src = '../images_base/product_trans_home_on.jpg';

ip_on = new Image();
ip_off = new Image();
ip_off.src = '../images_base/product_ip_home_off.jpg';
ip_on.src = '../images_base/product_ip_home_on.jpg';

more_on = new Image();
more_off = new Image();
more_off.src = '../images_base/news_more_home_off.gif';
more_on.src = '../images_base/news_more_home_on.gif';

obsin_on = new Image();
obsin_off = new Image();
obsin_off.src = '../images_base/in_obs_off.jpg';
obsin_on.src = '../images_base/in_obs_on.jpg';

navin_on = new Image();
navin_off = new Image();
navin_off.src = '../images_base/in_nav_off.jpg';
navin_on.src = '../images_base/in_nav_on.jpg';

recin_on = new Image();
recin_off = new Image();
recin_off.src = '../images_base/in_rec_off.jpg';
recin_on.src = '../images_base/in_rec_on.jpg';

monin_on = new Image();
monin_off = new Image();
monin_off.src = '../images_base/in_mon_off.jpg';
monin_on.src = '../images_base/in_mon_on.jpg';

ipin_on = new Image();
ipin_off = new Image();
ipin_off.src = '../images_base/in_ip_off.jpg';
ipin_on.src = '../images_base/in_ip_on.jpg';

tranin_on = new Image();
tranin_off = new Image();
tranin_off.src = '../images_base/in_trans_off.jpg';
tranin_on.src = '../images_base/in_trans_on.jpg';

news1_on = new Image();
news1_off = new Image();
news1_off.src = '../images_base/arrow_off.gif';
news1_on.src = '../images_base/arrow_on.gif';

news2_on = new Image();
news2_off = new Image();
news2_off.src = '../images_base/arrow_off.gif';
news2_on.src = '../images_base/arrow_on.gif';

news3_on = new Image();
news3_off = new Image();
news3_off.src = '../images_base/arrow_off.gif';
news3_on.src = '../images_base/arrow_on.gif';

arrow1_on = new Image();
arrow1_off = new Image();
arrow1_off.src = '../images_base/arrow_off.gif';
arrow1_on.src = '../images_base/arrow_on.gif';

arrow2_on = new Image();
arrow2_off = new Image();
arrow2_off.src = '../images_base/arrow_off.gif';
arrow2_on.src = '../images_base/arrow_on.gif';

arrow3_on = new Image();
arrow3_off = new Image();
arrow3_off.src = '../images_base/arrow_off.gif';
arrow3_on.src = '../images_base/arrow_on.gif';

arrow4_on = new Image();
arrow4_off = new Image();
arrow4_off.src = '../images_base/arrow_off.gif';
arrow4_on.src = '../images_base/arrow_on.gif';

arrow5_on = new Image();
arrow5_off = new Image();
arrow5_off.src = '../images_base/arrow_off.gif';
arrow5_on.src = '../images_base/arrow_on.gif';

arrow6_on = new Image();
arrow6_off = new Image();
arrow6_off.src = '../images_base/arrow_off.gif';
arrow6_on.src = '../images_base/arrow_on.gif';

arrow7_on = new Image();
arrow7_off = new Image();
arrow7_off.src = '../images_base/arrow_off.gif';
arrow7_on.src = '../images_base/arrow_on.gif';

arrow8_on = new Image();
arrow8_off = new Image();
arrow8_off.src = '../images_base/arrow_off.gif';
arrow8_on.src = '../images_base/arrow_on.gif';

arrow9_on = new Image();
arrow9_off = new Image();
arrow9_off.src = '../images_base/arrow_off.gif';
arrow9_on.src = '../images_base/arrow_on.gif';

arrow10_on = new Image();
arrow10_off = new Image();
arrow10_off.src = '../images_base/arrow_off.gif';
arrow10_on.src = '../images_base/arrow_on.gif';

arrow11_on = new Image();
arrow11_off = new Image();
arrow11_off.src = '../images_base/arrow_off.gif';
arrow11_on.src = '../images_base/arrow_on.gif';

arrow12_on = new Image();
arrow12_off = new Image();
arrow12_off.src = '../images_base/arrow_off.gif';
arrow12_on.src = '../images_base/arrow_on.gif';

arrowb1_on = new Image();
arrowb1_off = new Image();
arrowb1_off.src = '../images_base/arrow_b_off.gif';
arrowb1_on.src = '../images_base/arrow_on.gif';

arrowb2_on = new Image();
arrowb2_off = new Image();
arrowb2_off.src = '../images_base/arrow_b_off.gif';
arrowb2_on.src = '../images_base/arrow_on.gif';

arrowb3_on = new Image();
arrowb3_off = new Image();
arrowb3_off.src = '../images_base/arrow_b_off.gif';
arrowb3_on.src = '../images_base/arrow_on.gif';

arrowb4_on = new Image();
arrowb4_off = new Image();
arrowb4_off.src = '../images_base/arrow_b_off.gif';
arrowb4_on.src = '../images_base/arrow_on.gif';

arrowb5_on = new Image();
arrowb5_off = new Image();
arrowb5_off.src = '../images_base/arrow_b_off.gif';
arrowb5_on.src = '../images_base/arrow_on.gif';

arrowk_on = new Image();
arrowk_off = new Image();
arrowk_off.src = '../images_base/arrow_k_off.gif';
arrowk_on.src = '../images_base/arrow_on.gif';

newsmore_on = new Image();
newsmore_off = new Image();
newsmore_off.src = '../images_base/news_more_home_off.gif';
newsmore_on.src = '../images_base/news_more_home_on.gif';

dock_on = new Image();
dock_off = new Image();
dock_off.src = '../images_base/black_anim.gif';
dock_on.src = '../images_base/black_comment.gif';

obox_on = new Image();
obox_off = new Image();
obox_off.src = '../images_base/in_obs_box_off.jpg';
obox_on.src = '../images_base/in_obs_box_on.jpg';

odome_on = new Image();
odome_off = new Image();
odome_off.src = '../images_base/in_obs_dome_off.jpg';
odome_on.src = '../images_base/in_obs_dome_on.jpg';

omin_on = new Image();
omin_off = new Image();
omin_off.src = '../images_base/in_obs_min_off.jpg';
omin_on.src = '../images_base/in_obs_min_on.jpg';

oir_on = new Image();
oir_off = new Image();
oir_off.src = '../images_base/in_obs_ir_off.jpg';
oir_on.src = '../images_base/in_obs_ir_on.jpg';

osp_on = new Image();
osp_off = new Image();
osp_off.src = '../images_base/in_obs_speed_off.jpg';
osp_on.src = '../images_base/in_obs_speed_on.jpg';

olens_on = new Image();
olens_off = new Image();
olens_off.src = '../images_base/na_obs_lens_off.jpg';
olens_on.src = '../images_base/na_obs_lens_on.jpg';

obox1_on = new Image();
obox1_off = new Image();
obox1_off.src = '../images_base/na_obs_box_off.jpg';
obox1_on.src = '../images_base/na_obs_box_on.jpg';

odome1_on = new Image();
odome1_off = new Image();
odome1_off.src = '../images_base/na_obs_dome_off.jpg';
odome1_on.src = '../images_base/na_obs_dome_on.jpg';

omin1_on = new Image();
omin1_off = new Image();
omin1_off.src = '../images_base/na_obs_min_off.jpg';
omin1_on.src = '../images_base/na_obs_min_on.jpg';

oir1_on = new Image();
oir1_off = new Image();
oir1_off.src = '../images_base/na_obs_ir_off.jpg';
oir1_on.src = '../images_base/na_obs_ir_on.jpg';

osp1_on = new Image();
osp1_off = new Image();
osp1_off.src = '../images_base/na_obs_speed_off.jpg';
osp1_on.src = '../images_base/na_obs_speed_on.jpg';

navin1_on = new Image();
navin1_off = new Image();
navin1_off.src = '../images_base/in_nav_c1_off.jpg';
navin1_on.src = '../images_base/in_nav_c1_on.jpg';

navin2_on = new Image();
navin2_off = new Image();
navin2_off.src = '../images_base/in_nav_c2_off.jpg';
navin2_on.src = '../images_base/in_nav_c2_on.jpg';

navin3_on = new Image();
navin3_off = new Image();
navin3_off.src = '../images_base/in_nav_matrix_off.jpg';
navin3_on.src = '../images_base/in_nav_matrix_on.jpg';

navin4_on = new Image();
navin4_off = new Image();
navin4_off.src = '../images_base/in_nav_multi_off.jpg';
navin4_on.src = '../images_base/in_nav_multi_on.jpg';

navin5_on = new Image();
navin5_off = new Image();
navin5_off.src = '../images_base/in_nav_4ch_off.jpg';
navin5_on.src = '../images_base/in_nav_4ch_on.jpg';

navin6_on = new Image();
navin6_off = new Image();
navin6_off.src = '../images_base/in_nav_8ch_off.jpg';
navin6_on.src = '../images_base/in_nav_8ch_on.jpg';

navna1_on = new Image();
navna1_off = new Image();
navna1_off.src = '../images_base/na_nav_c1_off.jpg';
navna1_on.src = '../images_base/na_nav_c1_on.jpg';

navna2_on = new Image();
navna2_off = new Image();
navna2_off.src = '../images_base/na_nav_c2_off.jpg';
navna2_on.src = '../images_base/na_nav_c2_on.jpg';

navna3_on = new Image();
navna3_off = new Image();
navna3_off.src = '../images_base/na_nav_matrix_off.jpg';
navna3_on.src = '../images_base/na_nav_matrix_on.jpg';

navna4_on = new Image();
navna4_off = new Image();
navna4_off.src = '../images_base/na_nav_multi_off.jpg';
navna4_on.src = '../images_base/na_nav_multi_on.jpg';

recin1_on = new Image();
recin1_off = new Image();
recin1_off.src = '../images_base/in_rec_dvr1_off.jpg';
recin1_on.src = '../images_base/in_rec_dvr1_on.jpg';

recin2_on = new Image();
recin2_off = new Image();
recin2_off.src = '../images_base/in_rec_dvr2_off.jpg';
recin2_on.src = '../images_base/in_rec_dvr2_on.jpg';

recin3_on = new Image();
recin3_off = new Image();
recin3_off.src = '../images_base/in_rec_vcr_off.jpg';
recin3_on.src = '../images_base/in_rec_vcr_on.jpg';

recin4_on = new Image();
recin4_off = new Image();
recin4_off.src = '../images_base/in_rec_pc1_off.jpg';
recin4_on.src = '../images_base/in_rec_pc1_on.jpg';

recin5_on = new Image();
recin5_off = new Image();
recin5_off.src = '../images_base/in_rec_pc2_off.jpg';
recin5_on.src = '../images_base/in_rec_pc2_on.jpg';

recna1_on = new Image();
recna1_off = new Image();
recna1_off.src = '../images_base/na_rec_dvr1_off.jpg';
recna1_on.src = '../images_base/na_rec_dvr1_on.jpg';

recna2_on = new Image();
recna2_off = new Image();
recna2_off.src = '../images_base/na_rec_dvr2_off.jpg';
recna2_on.src = '../images_base/na_rec_dvr2_on.jpg';

recna3_on = new Image();
recna3_off = new Image();
recna3_off.src = '../images_base/na_rec_vcr_off.jpg';
recna3_on.src = '../images_base/na_rec_vcr_on.jpg';

recna4_on = new Image();
recna4_off = new Image();
recna4_off.src = '../images_base/na_rec_pc1_off.jpg';
recna4_on.src = '../images_base/na_rec_pc1_on.jpg';

recna5_on = new Image();
recna5_off = new Image();
recna5_off.src = '../images_base/na_rec_pc2_off.jpg';
recna5_on.src = '../images_base/na_rec_pc2_on.jpg';

monin1_on = new Image();
monin1_off = new Image();
monin1_off.src = '../images_base/in_mon_mon1_off.jpg';
monin1_on.src = '../images_base/in_mon_mon1_on.jpg';

monin2_on = new Image();
monin2_off = new Image();
monin2_off.src = '../images_base/in_mon_mon2_off.jpg';
monin2_on.src = '../images_base/in_mon_mon2_on.jpg';

monin3_on = new Image();
monin3_off = new Image();
monin3_off.src = '../images_base/in_mon_mon3_off.jpg';
monin3_on.src = '../images_base/in_mon_mon3_on.jpg';

monin4_on = new Image();
monin4_off = new Image();
monin4_off.src = '../images_base/in_mon_mon4_off.jpg';
monin4_on.src = '../images_base/in_mon_mon4_on.jpg';

monin5_on = new Image();
monin5_off = new Image();
monin5_off.src = '../images_base/in_mon_mon5_off.jpg';
monin5_on.src = '../images_base/in_mon_mon5_on.jpg';

monna1_on = new Image();
monna1_off = new Image();
monna1_off.src = '../images_base/na_mon_mon1_off.jpg';
monna1_on.src = '../images_base/na_mon_mon1_on.jpg';

monna2_on = new Image();
monna2_off = new Image();
monna2_off.src = '../images_base/na_mon_mon2_off.jpg';
monna2_on.src = '../images_base/na_mon_mon2_on.jpg';

monna3_on = new Image();
monna3_off = new Image();
monna3_off.src = '../images_base/na_mon_mon3_off.jpg';
monna3_on.src = '../images_base/na_mon_mon3_on.jpg';

monna4_on = new Image();
monna4_off = new Image();
monna4_off.src = '../images_base/na_mon_mon4_off.jpg';
monna4_on.src = '../images_base/na_mon_mon4_on.jpg';

monna5_on = new Image();
monna5_off = new Image();
monna5_off.src = '../images_base/na_mon_mon5_off.jpg';
monna5_on.src = '../images_base/na_mon_mon5_on.jpg';

intran1_on = new Image();
intran1_off = new Image();
intran1_off.src = '../images_base/in_tran1_off.jpg';
intran1_on.src = '../images_base/in_tran1_on.jpg';

intran2_on = new Image();
intran2_off = new Image();
intran2_off.src = '../images_base/in_tran2_off.jpg';
intran2_on.src = '../images_base/in_tran2_on.jpg'

intran3_on = new Image();
intran3_off = new Image();
intran3_off.src = '../images_base/in_tran3_off.jpg';
intran3_on.src = '../images_base/in_tran3_on.jpg'

intran4_on = new Image();
intran4_off = new Image();
intran4_off.src = '../images_base/in_tran4_off.jpg';
intran4_on.src = '../images_base/in_tran4_on.jpg'

intran5_on = new Image();
intran5_off = new Image();
intran5_off.src = '../images_base/in_tran5_off.jpg';
intran5_on.src = '../images_base/in_tran5_on.jpg'

natran1_on = new Image();
natran1_off = new Image();
natran1_off.src = '../images_base/na_tran1_off.jpg';
natran1_on.src = '../images_base/na_tran1_on.jpg'

natran2_on = new Image();
natran2_off = new Image();
natran2_off.src = '../images_base/na_tran2_off.jpg';
natran2_on.src = '../images_base/na_tran2_on.jpg'

natran3_on = new Image();
natran3_off = new Image();
natran3_off.src = '../images_base/na_tran3_off.jpg';
natran3_on.src = '../images_base/na_tran3_on.jpg'

natran4_on = new Image();
natran4_off = new Image();
natran4_off.src = '../images_base/na_tran4_off.jpg';
natran4_on.src = '../images_base/na_tran4_on.jpg'

natran5_on = new Image();
natran5_off = new Image();
natran5_off.src = '../images_base/in_tran5_off.jpg';
natran5_on.src = '../images_base/in_tran5_on.jpg'

}

function on(image) {
  if (parseInt(navigator.appVersion.substring(0,1))>=3) { // 3.0 or greater.
      imagesrc = eval(image + '_on.src');
      document[image].src = imagesrc;
  }
}

function off(image) {
  if (parseInt(navigator.appVersion.substring(0,1))>=3) { // 3.0 or greater.
      imagesrc = eval(image + "_off.src");
      document[image].src = imagesrc;
 }
}