/* 	SET VARIABLES
**************************************************/
//var image_id		= 'image_id';			// THE ID OF THE IMAGE DIV
var thumb_id		= 'thumb_id'			// THE ID OF THE THUMBNAILS DIV
var thumb_index		= 0;					// CURRENT THUMB POSITION - 0 IS BEGINNING
var thumb_total		= 0;					// TOTAL NUMBER OF ROWS
var thumb_size		= 128;					// SIZE OF ROW PLUS SPACING
var thumb_visible	= 2;					// VISIBLE NUMBER OF ROWS

function Set_Total(num) {
	thumb_total = num;
}






/* MOVE THE THUMBNAILS LEFT OR RIGHT
**************************************************/
Effect.Transitions.exponential = function(pos) {
  return (1 - Math.pow(1 - pos, 4));
}

	// SLIDE THE THUMBNAILS TO THE RIGHT
function Prev() {
	if (thumb_index != 0 && thumb_total > thumb_visible) {
	    new Effect.MoveBy(thumb_id, 0, thumb_size , { duration: 0.4,  transition: Effect.Transitions.exponential, queue: 'end' } );
		thumb_index--;
	}
}

	// SLIDE THE THUMBNAILS TO THE LEFT
function Next() {
	if ( (thumb_total - thumb_index - thumb_visible) > 0) {
	    new Effect.MoveBy(thumb_id, 0, -thumb_size, { duration: 0.4, transition: Effect.Transitions.exponential, queue: 'end' } );
		thumb_index++;
	}
}






/* CHANGE THE IMAGE & DESCRIPTION
**************************************************
function Switch_Image(File) {
	$(image_id).innerHTML = '<img src="' + File + '"/>';
}






/* END OF FILE
**************************************************/