function showPiece(id) {
	document.largepiece.src = 'images/pieces/'+id+'.jpg';
	if (typeof(currentPiece)!='undefined') {
		previousPiece = currentPiece;
	}
	currentPiece = id;
	
	$('gallery_piece_thumb_'+currentPiece).addClassName('gallery_piece_thumb_over');
	if (typeof(previousPiece)!='undefined') {
		$('gallery_piece_thumb_'+previousPiece).removeClassName('gallery_piece_thumb_over');
	}
	
	new Ajax.Request("controller.php?action=getPieceInformation&id="+id, { 
		onSuccess: function(t) {
			$('gallery_pieceinfo').innerHTML = t.responseText;
		}
	});
}

function showPreviousPiece(currentPiece, galleryId) {
	new Ajax.Request("controller.php?action=getPreviousPiece&id="+currentPiece+"&galleryid="+galleryId, { 
		onSuccess: function(t) {
			var pieceId = parseFloat(t.responseText);
			showPiece(pieceId);
		}
	});
	
}

function showNextPiece(currentPiece, galleryId) {
	previousPiece = currentPiece;
	new Ajax.Request("controller.php?action=getNextPiece&id="+currentPiece+"&galleryid="+galleryId, { 
		onSuccess: function(t) {
			var pieceId = parseFloat(t.responseText);
			showPiece(pieceId);
		}
	});
}

function openFullPiece() {
	window.open('piece.php?id='+currentPiece, 'fullPiece', 'width=800,height=600,scrollbars=auto,menubar=0,location=0,status=0');
}