/**
 * @author Sławomir Kokłowski {@link http://www.kurshtml.boo.pl}
 * @copyright NIE usuwaj tego komentarza! (Do NOT remove this comment!)
 */

function PrzegladarkaZdjec(id, zdjecia)
{
     this.czas = 6;     // czas przejścia w trybie pokazu slajdów [sek]
     
     
     this.id = id;
     this.zdjecia = zdjecia;
     var timerID = null;
     
     this.wyswietl = function(nr)
     {
          clearTimeout(timerID);          
          var f = document.getElementById(this.id);
          
          if (nr < 0) nr = f.elements['zdjecia'].options.length - 1;
          else if (nr > f.elements['zdjecia'].options.length - 1) nr = 0;
          
          if (nr == 0)
          {
               f.elements['poczatek'].disabled = true;
               f.elements['wstecz'].disabled = true;
               f.elements['dalej'].disabled = false;
               f.elements['koniec'].disabled = false;
          }
          else if (nr == f.elements['zdjecia'].options.length - 1)
          {
               f.elements['poczatek'].disabled = false;
               f.elements['wstecz'].disabled = false;
               f.elements['dalej'].disabled = true;
               f.elements['koniec'].disabled = true;
          }
          else
          {
               f.elements['poczatek'].disabled = false;
               f.elements['wstecz'].disabled = false;
               f.elements['dalej'].disabled = false;
               f.elements['koniec'].disabled = false;
          }
          
          f.elements['zdjecia'].selectedIndex = nr;
          document.getElementById(this.id + '__img').src = f.elements['zdjecia'].options[nr].value;
          document.getElementById(this.id + '__opis').innerHTML = typeof this.zdjecia[nr][2] != 'undefined' ? this.zdjecia[nr][2] : '';
          if (f.elements['auto'].checked) this.przewin();
     }
     
     this.przewin = function()
     {
          clearTimeout(timerID);
          var f = document.getElementById(this.id);
          if (f.elements['auto'].checked)
          {
               if (document.getElementById(this.id + '__img').complete) timerID = setTimeout(this.id + '.wyswietl(' + (f.elements['zdjecia'].selectedIndex < f.elements['zdjecia'].options.length - 1 ? f.elements['zdjecia'].selectedIndex + 1 : 0) + ')', this.czas * 1000);
               else timerID = setTimeout(this.id + '.przewin()', 500);
          }
     }
     
     var matches = window.location.search.match(new RegExp('[\?&]' + this.id + '=(-?[0-9]+)(&|$)'));
     if (matches && typeof matches[1] != 'undefined')
     {
          var auto = matches[1].substring(0, 1) == '-' ? true : false;
          matches[1] = parseInt(matches[1]);
          var nr = Math.abs(matches[1]);
          if (nr < 0) nr = 0;
          else if (nr > zdjecia.length - 1) nr = zdjecia.length - 1;
     }
     else
     {
          var nr = 0;
          var auto = false;
     }
     
     for (var i = 0, html = ''; i < zdjecia.length; i++)
     {
          html += '<option value="' + zdjecia[i][0] + '"' + (i == nr ? ' selected="selected"' : '') + '>' + zdjecia[i][1] + '</option>';
     }
     
     document.write(
          '<form action="javascript:void(0)" id="' + this.id + '" class="zdjecia">' +
               '<div class="zdjecia_menu">' +
                    '<input type="button" name="poczatek" value="|&lt;&lt;"' + (nr == 0 ? ' disabled="disabled"' : '') + ' title="Początek" onclick="' + this.id + '.wyswietl(0)" onkeypress="' + this.id + '.wyswietl(0)" />' +
                    '<input type="button" name="wstecz" value="  &lt;&lt;  "' + (nr == 0 ? ' disabled="disabled"' : '') + ' title="Wstecz" onclick="' + this.id + '.wyswietl(this.form.elements[\'zdjecia\'].selectedIndex - 1)" onkeypress="' + this.id + '.wyswietl(this.form.elements[\'zdjecia\'].selectedIndex - 1)" />' +
                    ' <select name="zdjecia" onchange="' + this.id + '.wyswietl(this.selectedIndex)">' +
                         html +
                    '</select> ' +
                    '<input type="button" name="dalej" value="  &gt;&gt;  "' + (nr == zdjecia.length - 1 ? ' disabled="disabled"' : '') + ' title="Dalej" onclick="' + this.id + '.wyswietl(this.form.elements[\'zdjecia\'].selectedIndex + 1)" onkeypress="' + this.id + '.wyswietl(this.form.elements[\'zdjecia\'].selectedIndex + 1)" />' +
                    '<input type="button" name="koniec" value="&gt;&gt;|"' + (nr == zdjecia.length - 1 ? ' disabled="disabled"' : '') + ' title="Koniec" onclick="' + this.id + '.wyswietl(this.form.elements[\'zdjecia\'].options.length - 1)" onkeypress="' + this.id + '.wyswietl(this.form.elements[\'zdjecia\'].options.length - 1)" />' +
                    '<div><input type="checkbox" name="auto"' + (auto ? ' checked="checked"' : '') + ' id="' + this.id + '__auto" onclick="' + this.id + '.przewin()" onkeypress="' + this.id + '.przewin()" style="vertical-align: middle" /> <label for="' + this.id + '__auto">Pokaz slajdów</label></div>' +
               '</div>' +
               '<img id="' + this.id + '__img" src="' + zdjecia[nr][0] + '" alt="" title="Następne.." onclick="' + this.id + '.wyswietl(document.getElementById(\'' + this.id + '\').elements[\'zdjecia\'].selectedIndex + 1)" />' +
               '<div class="zdjecia_opis" id="' + this.id + '__opis">' + (typeof zdjecia[nr][2] != 'undefined' ? zdjecia[nr][2]: '') + '</div>' +
          '</form>'
     );
     
     if (auto) this.przewin();
}