// JScript File
var photo_id = new Array();
var photo_path = new Array();
var photo_alt = new Array();
var photo_description = new Array(); 
var photo_url = new Array();
            
var position = new Number;
var last_position = new Number;

position=1

function show_picture(_id,path,alt,description){
	document.getElementById("picture").innerHTML = "<img src='"+path+"' alt='"+alt+"' height='238'><br />";
	
	document.getElementById("imgCaption").innerHTML = description;

	
	set_photo_position(_id);
}
 
function move_photo(action){

	var next_id = new Number;
	if(action=='prev'){
		if(position==1){
			next_id=last_position;
		}
		else{
			next_id = position;
			next_id--;
		}
	}
	else{	
		if(position==last_position){
			next_id=1;
		}
		else{
			next_id = position;
			next_id++;
		}
	}	
	show_picture(next_id,photo_path[next_id],photo_alt[next_id],photo_alt[next_id])
}

function set_photo_position(_id){
	position = _id;
}