function thumbnailsNavigationGoto(page){
	offset = - page * thumbnailsViewerContainerHeight;
	$('#thumbnailsNavigationPage' + thumbnailsViewerActivePage).removeClass('thumbnailsNavigationPageActive');
	thumbnailsViewerActivePage = page;
	$('#thumbnailsNavigationPage' + thumbnailsViewerActivePage).addClass('thumbnailsNavigationPageActive');
	
	if(thumbnailsViewerActivePage == thumbnailsViewerPages - 1){
		$('#thumbnailsNavigationRight').addClass('thumbnailsNavigationRightDisabled');
	}
	else{
		$('#thumbnailsNavigationRight').removeClass('thumbnailsNavigationRightDisabled');
	}
	
	
	if(thumbnailsViewerActivePage == 0){
		$('#thumbnailsNavigationLeft').addClass('thumbnailsNavigationLeftDisabled');
	}
	else{
		$('#thumbnailsNavigationLeft').removeClass('thumbnailsNavigationLeftDisabled');
	}
	
	$('#thumbnailItems').animate({marginTop: offset}, 200);
}

function thumbnailsNavigationLeft(){
	var gotoPage = thumbnailsViewerPages - 1;
	
	if(thumbnailsViewerActivePage > 0)
		gotoPage = thumbnailsViewerActivePage - 1;
		
	thumbnailsNavigationGoto(gotoPage);
}

function thumbnailsNavigationRight(){
	var gotoPage = 0;
	
	if(thumbnailsViewerActivePage < thumbnailsViewerPages - 1)
		gotoPage = thumbnailsViewerActivePage + 1;
		
	thumbnailsNavigationGoto(gotoPage);
}