/* 	SET VARIABLES
**************************************************/
var image_ary	= new Array();
var image_path	= '';
var image_index = 0;
var image_total	= 0;
var left_index	= 0;
var rght_index	= 0;
var left_id		= 'left_photo';
var rght_id		= 'rght_photo';






/* MOVE THE THUMBNAILS LEFT OR RIGHT
**************************************************/
Effect.Transitions.exponential = function(pos) {
  return (1 - Math.pow(1 - pos, 2));
}

	// MOVE THE IMAGE TO THE RIGHT
function Prev() {
		// SET VARAIBLES
	image_index--;
	if (image_index < 0) { image_index = image_total - 1; }
	left_index = image_index;

	if ((left_index + 1) == image_total) {
		rght_index = 0;
	} else {
		rght_index = left_index + 1;
	}

		// SET LEFT AND RIGHT IMAGE
	$(left_id).innerHTML = image_ary[left_index];
	$(rght_id).innerHTML = image_ary[rght_index];
}

	// MOVE THE IMAGE TO THE LEFT
function Next() {

		// SET VARAIBLES
	image_index++;
	if (image_index == image_total) { image_index = 0; }
	left_index = image_index;

	if ((left_index + 1) == image_total) {
		rght_index = 0;
	} else {
		rght_index = left_index + 1;
	}

		// SET LEFT AND RIGHT IMAGE
	$(left_id).innerHTML = image_ary[left_index];
	$(rght_id).innerHTML = image_ary[rght_index];
}






/* CHANGE THE GALLERY
**************************************************/
	// THE 'url' IS RELATIVE TO THE FILE CALLING IT,
	// SO A PAGE IN A SUB-DIRECTORY WON'T BE ABLE TO CALL IT.
	// IT MUST ALWAYS BE CALLED STARTING FROM THE ROOT DOMAIN
function Switch_Gallery(path, id) {
	image_path = image_files_path + "files/img/gallery/";
	var url = path + "modules/photo_gallery/switch_gallery.php";
	var par = "id=" + id;
	var aj = new Ajax.Request(url, { method: 'post', parameters: par, onSuccess: Switch_Gallery_Success} );
	return false;
}

function Switch_Gallery_Success(response) {
	var fields = response.responseText.split("}|{");

		// SET VARIABLES
	image_total	= fields.shift();
	image_ary = fields;

		// SET LEFT AND RIGHT IMAGE
	$(left_id).innerHTML = '<img src="' + image_path + image_ary[0] + '" />';
	$(rght_id).innerHTML = '<img src="' + image_path + image_ary[1] + '" />';
	$(left_id).innerHTML = image_ary[0];
	$(rght_id).innerHTML = image_ary[1];
}






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