<!--
  function show_kat(val)
  {
    if(location.href.indexOf("?") == -1)
      location.href = location.href + '?kategorie=' + val;
    else
    {
      var arr_loc = location.href.split("?");
      var arr_quer = arr_loc[1].split("&");
      
      var var_found = false;


      for(var i=0; i<arr_quer.length; i++)
      {
        var arr_variab = arr_quer[i].split("=");

        if(arr_variab[0] == "kategorie")
        {
          if(val == 0)
            delete arr_quer[i];
          else
            arr_quer[i] = "kategorie="+val;
            
          var_found = true;
        }
      }
      
      if(!var_found)
        arr_quer[arr_quer.length] = "kategorie="+val;
        
      var arr_quer2 = arr_quer;
      var j = 0;
      
      var arr_quer;

      for(var i=0; i<arr_quer2.length; i++)
      {
        if(arr_quer2[i] == "" || arr_quer2[i] == undefined)
          continue;
        
        arr_quer[j] = arr_quer2[i];
        
        j++;
        
      }
      
      arr_quer.length = j;

      var loc = arr_loc[0];

      //if(arr_quer.join("&") != "")
      if(arr_quer.length > 0)
        loc += '?' + arr_quer.join("&");

      location.href = loc;
    }
  }
//-->