var gallery_theLastID = 0;
var galleryData = new Array();

function gallery_loadData()
{
	data = $('#gallery_photos_srcs li');
	
	for(var i = 0; i < data.length; i++ )
	{
		galleryData[i] = new Array();
		galleryData[i]["id"] = $(data[i]).attr("class");
		galleryData[i]["src"] = $(data[i]).text();
		galleryData[i]["title"] = $(data[i]).attr("title");
	}
}

function gallery_changePhoto(direction)
{
	var key = 0;
	
	/*
		Urceni klice aktualni polozky
	*/
	for(var i = 0; i < galleryData.length; i++ )
	{
		if(galleryData[i]["id"] == gallery_theLastID)
		{
			key = i;
		}
	}
	
	/*
		Urceni klice
	*/
	if(direction == 1)
	{
		key++;
		
		if(galleryData[key] == null)
		{
			key = 0;
		}
	}
	else
	{
		key--;
		
		if(galleryData[key] == null)
		{
			key = galleryData.length - 1;
		}
	}
	
	if(galleryData[key] != null)
	{
		gallery_showPhoto( galleryData[key]["id"], galleryData[key]["title"] );
	}
}

function gallery_showPhoto(id, title)
{
	$("div.item").removeClass("active");
	$("div.item#pic" + id).addClass("active");
	
	for(var i = 0; i < galleryData.length; i++ )
	{
		if(galleryData[i]["id"] == id)
		{
			gallery_theLastID = id;
			$('#galleryImage').attr("src", galleryData[i]["src"]);
			$('#displayedImageTitle').html(title);
		}
	}
}