$(document).ready(function(){
            var photoShow = 4; // pocet fotek, ktere budou videt
            var photoWidth = 152; // sirka jedne fotky (i s prilehlou mezerou)
            var photoCount = $(".gallery a.item").length; // pocet fotek celkem
            var maxBeltWidth = photoWidth * photoCount;
            var maxPosition = photoWidth * (photoCount - photoShow);
            var actualPosition = 0; // aktualni pozice v px
            
            // na zacatku vzdy schovame tlacitko na predchozi, pokud je fotek mene= viditelnych fotek schovame i tlacitko dalsi
            $("#GalleryviewButtonPrevious img").hide();
            if(photoCount<=photoShow)$("#GalleryviewButtonNext img").hide();
            $("#Galleryview .gallery").css("width",maxBeltWidth+"px");
          
            $("#GalleryviewButtonPrevious img").click(function(){$("ul.gallery").animate({left:-(getPosition(-photoWidth))},1000)});
            $("#GalleryviewButtonNext img").click(function(){$("ul.gallery").animate({left:-(getPosition(photoWidth))},1000)});
            
            function getPosition(incr){
                actualPosition=actualPosition+incr;
                // kontrola mezi a zneviditelneni tlacitek
                if(actualPosition <= 0){actualPosition = 0; $("#GalleryviewButtonPrevious img").hide();}else{$("#GalleryviewButtonPrevious img").show();}
                if(actualPosition >= maxPosition){actualPosition = maxPosition; $("#GalleryviewButtonNext img").hide();}else{$("#GalleryviewButtonNext img").show();}
                 
                return(actualPosition);
            }
            
            // toto je zde kvuli IE 6/7, jinak nefunguje spravne posuvnik galerii pri prvnim nacteni
            $("#tabs-4").click(function(){
            $("#Galleryview .gallery").css("width","200px");
            $("#Galleryview .gallery").css("width",maxBeltWidth+"px");
            });
            
});