var gSlideShowInterval;
if (gSlideShowInterval == undefined)
	gSlideShowInterval = 3000; // msecs between images.

var gAutoStartSlideShow;
if (gAutoStartSlideShow == undefined)
	gAutoStartSlideShow = true;

var gBehaviorsArray = [];
var gSlideShowOn = false;
var gSlideShowTimer = null;
var gImageLoader = null;

// Register a callback on the dsPhotos data set so we can turn
// off the slide show before it attempts to load new data.



// Register a callback on the thumbnails region so we can show the first
// image in the data set after all the thumbnails have loaded.



// Cancel the animation behavior of the object with the given id.

function CancelBehavior(id)
{
	if (gBehaviorsArray[id])
	{
		gBehaviorsArray[id].cancel();
		gBehaviorsArray[id] = null;
	}
}


// Show the image of the current selected row inside the dsPhotos data set.



// Utility function to advance (forwards or backwards) the current selected row
// in dsPhotos. This has the side effect of "selecting" the thumbnail and image
// of the new current row.

function AdvanceToNextImage(moveBackwards)
{
	var rows = dsPhotos.getData();
	var curRow = dsPhotos.getCurrentRow();
	
	if (rows.length < 1)
		return;
	
	for (var i = 0; i < rows.length; i++)
	{
		if (rows[i] == curRow)
		{
			if (moveBackwards)
				--i;
			else
				++i;
			break;
		}
	}
	
	if (!moveBackwards && i >= rows.length)
		i = 0;
	else if (moveBackwards && i < 0)
		i = rows.length - 1;
	
	curRow = rows[i];
	dsPhotos.setCurrentRow(curRow["ds_RowID"]);
	
}