disable keyboard control if lightbox is closed

README.md

@@ -66,6 +66,7 @@ var gallery = $('.gallery a').simpleLightbox();
 gallery.next(); // Next Image
 ```
 ### Changelog
+**1.3.1 - Bugfix: disable keyboard control if lightbox is closed**  
 **1.3.0 - Added current index indicator/counter**  
 **1.2.0 - Added option for captions attribute (title or data-title)**  
 **1.1.2 - Bugfix for looping images**  

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "simplelightbox",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "homepage": "http://andreknieriem.de/simple-lightbox",
   "authors": [
     "André Knieriem <[email protected]> (http://andreknieriem.de)"

dist/simple-lightbox.js

@@ -264,12 +264,15 @@ $.fn.simpleLightbox = function( options )
 		$( document ).on( 'keyup.'+prefix, function( e ){
 			e.preventDefault();
 			swipeDiff = 0;
-			var key = e.keyCode;
-			if( key == 27 ) {
-				close();
-			}
-			if( key == 37 || e.keyCode == 39 ) {
-				loadImage( e.keyCode == 39 ? 1 : -1 );
+			// keyboard control only if lightbox is open
+			if(opened){
+				var key = e.keyCode;
+				if( key == 27 ) {
+					close();
+				}
+				if( key == 37 || e.keyCode == 39 ) {
+					loadImage( e.keyCode == 39 ? 1 : -1 );
+				}
 			}
 		});
 	}