function gal_a(img_source,url,alt,chance) {
   this.img_source = img_source;
   this.url = url;
   this.alt = alt;
   this.chance = chance;
}
function display() {
   with (this) document.write("<A HREF=" + url + " rel='lightbox'><IMG SRC='" + img_source + "' WIDTH=150 HEIGHT=113 BORDER=0 ALT='" + alt + "'></A>");
}
gal_a.prototype.display = display;
gal_as = new Array();
gal_as[0] = new gal_a("img_gal/s/sala_00.jpg",
                        "img_gal/b/sala_00.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_as[1] = new gal_a("img_gal/s/40.jpg",
                        "img_gal/b/40.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_as[2] = new gal_a("img_gal/s/42.jpg",
                        "img_gal/b/42.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_as[3] = new gal_a("img_gal/s/43.jpg",
                        "img_gal/b/43.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_as[4] = new gal_a("img_gal/s/45.jpg",
                        "img_gal/b/45.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_as[5] = new gal_a("img_gal/s/39.jpg",
                        "img_gal/b/39.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_as[6] = new gal_a("img_gal/s/21.jpg",
                        "img_gal/b/21.jpg",
                        "Kliknij by powiększyć",
                        30);
sum_of_all_chances = 0;
for (i = 0; i < gal_as.length; i++) {
   sum_of_all_chances += gal_as[i].chance;
}
function display_gala() {
   chance_limit = 0;
   randomly_selected_chance = Math.round((sum_of_all_chances - 1) * Math.random()) + 1;
   for (i = 0; i < gal_as.length; i++) {
      chance_limit += gal_as[i].chance;
      if (randomly_selected_chance <= chance_limit) {
         document.write("<A HREF=" + gal_as[i].url + " rel='lightbox'><IMG CLASS='img'SRC='" + gal_as[i].img_source + "' WIDTH=150 HEIGHT=113 BORDER=0 ALT='" + gal_as[i].alt + "'></A>");
         return gal_as[i];
         break;
      }
   }
}

 function gal_b(img_source,url,alt,chance) {
   this.img_source = img_source;
   this.url = url;
   this.alt = alt;
   this.chance = chance;
}
function display() {
   with (this) document.write("<A HREF=" + url + " rel='lightbox'><IMG SRC='" + img_source + "' WIDTH=150 HEIGHT=113 BORDER=0 ALT='" + alt + "'></A>");
}
gal_b.prototype.display = display;
gal_bs = new Array();
gal_bs[0] = new gal_b("img_gal/s/sala_08.jpg",
                        "img_gal/b/sala_08.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_bs[1] = new gal_b("img_gal/s/10.jpg",
                        "img_gal/b/10.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_bs[2] = new gal_b("img_gal/s/sala_01.jpg",
                        "img_gal/b/sala_01.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_bs[3] = new gal_b("img_gal/s/sala_02.jpg",
                        "img_gal/b/sala_02.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_bs[4] = new gal_b("img_gal/s/sala_03.jpg",
                        "img_gal/b/sala_03.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_bs[5] = new gal_b("img_gal/s/18.jpg",
                        "img_gal/b/18.jpg",
                        "Kliknij by powiększyć",
                        30);
gal_bs[6] = new gal_b("img_gal/s/30.jpg",
                        "img_gal/b/30.jpg",
                        "Kliknij by powiększyć",
                        30);
sum_of_all_chances = 0;
for (i = 0; i < gal_bs.length; i++) {
   sum_of_all_chances += gal_bs[i].chance;
}
function display_galb() {
   chance_limit = 0;
   randomly_selected_chance = Math.round((sum_of_all_chances - 1) * Math.random()) + 1;
   for (i = 0; i < gal_bs.length; i++) {
      chance_limit += gal_bs[i].chance;
      if (randomly_selected_chance <= chance_limit) {
         document.write("<A HREF=" + gal_bs[i].url + " rel='lightbox'><IMG CLASS='img'SRC='" + gal_bs[i].img_source + "' WIDTH=150 HEIGHT=113 BORDER=0 ALT='" + gal_bs[i].alt + "'></A>");
         return gal_bs[i];
         break;
      }
   }
}