function gallery(){
	$(document).ready(function(){
		$('#innerMenu a').click(function(e){
			e.preventDefault();
			var alreadyActive = $('#innerMenu a.active');
			if(alreadyActive.length!=0){
				var id = alreadyActive.attr('id');
				$('#'+id+'_content .active').css('display', 'none').removeClass('active');
				$('#'+id+'_content').css('display', 'none').removeClass('active');
				alreadyActive.removeClass('active');
			}
			var id = $(this).attr('id');
			$(this).addClass('active');	
			$('#number').val(1);
			$('#'+id+'_content_1').css('display', 'block').addClass('active');
			$('#'+id+'_content').fadeIn(400).addClass('active');
			recalculateButtons();
		});
		
		$('.button').click(function(e){
			e.preventDefault();
				var alreadyActive = $('#innerMenu a.active');
				var number = $('#number').val();
				number = Number(number);
				if(alreadyActive.length!=0){
					var id = alreadyActive.attr('id');
					if($(this).hasClass('prev')){
						var newNumber = number-1;
					}else{
						var newNumber = number+1;
					}
					$('#'+id+'_content_'+number).fadeOut(300, function(){
						$(this).removeClass('active')
						$('#'+id+'_content_'+newNumber).fadeIn(300).addClass('active');
						$('#number').val(newNumber);
						recalculateButtons();	
					});
				}

		});	
		
		$('#gallery1').click();
		$('#gallery12').click();
		$('#gallery18').click();
		
	});
}

function recalculateButtons(){
			$(document).ready(function(){
				var alreadyActive = $('#innerMenu a.active');
				var number = $('#number').val();
				number = Number(number);
				if(alreadyActive.length!=0){
					var id = alreadyActive.attr('id');
					var next = number+1;
					var prev = number-1;
					if($('#'+id+'_content_'+next).length!=0){
						$('#next').fadeIn(200);
					}else{
						$('#next').fadeOut(200);
					}
					if($('#'+id+'_content_'+prev).length!=0){
						$('#prev').fadeIn(200);
					}else{
						$('#prev').fadeOut(200);
					}
				}
			});
}