var ChangeTab = function(dzial_id, page, alfa, sort){

   if(dzial_id==undefined){dzial_id=0;}
   if(page==undefined){page=1;}
   if(alfa==undefined){alfa=0;}
   if(sort==undefined){sort=0;}

   var wideo_content = document.getElementById('wideo_content');
   wideo_content.innerHTML = '<div class="loading">Prosz\u0119 czekać...</div>';
   wideo_content.style.minHeight = '700px';
   wideo_content.style.backgroundColor = '#f6f8e6';

   //ustawianie

   var tab;
   for(var i=1;i<8;i++){
      if (i==1||i==3||i==4||i==6) continue;
      tab = document.getElementById('tab'+i);
      tab.className = 'before';
   }
   tab.className = 'before last';

     tab = document.getElementById('tab'+dzial_id);

   if(dzial_id == i - 1)
   {
      tab.className = 'selected last_selected';
     }
     else
   {
      tab.className = 'selected';
     }

   tab = document.getElementById('tab'+(dzial_id-1));
   if(tab != undefined){
      tab.className += ' before_one';
   }




   advAJAX.get({
      url: dzial_id + ',' + page + ',' + alfa + ',' + sort + ',ajax_wideo.html',
      timeout : 15000,
      retry: 2,
      retryDelay: 2000,

      onTimeout : function() {
         wideo_content.innerHTML = '<div class="loading">Prosz\u0119 czekać...</div>';
      },

      onRetry : function() {
         wideo_content.innerHTML = '<div class="loading">Prosz\u0119 czekać...</div>';
      },

      onRetryDelay : function() {
         wideo_content.innerHTML = '<div class="loading">Prosz\u0119 czekać...</div>';
      },

      onSuccess : function(obj) {
         wideo_content.innerHTML = obj.responseText;
      },

      onError : function(obj){
         wideo_content.innerHTML = '<div class="loading">Prosz\u0119 czekać...</div>';
      }
   });
}