bugfix.

diff --git a/skins/photo_lightbox_viewer.js b/skins/photo_lightbox_viewer.js
index 97c7f7960b7c1ca8587aa1bfef03581fe285720b..343815151946bf581bc07d2aec41463a87f7819b 100644 (file)
--- a/skins/photo_lightbox_viewer.js
+++ b/skins/photo_lightbox_viewer.js
@@ -482,10 +482,10 @@ Lightbox.prototype.onDragStart = function(evt) {
 
 Lightbox.prototype.onDragOver = function(evt) {
        var target = getTargetedObject(evt);
 
 Lightbox.prototype.onDragOver = function(evt) {
        var target = getTargetedObject(evt);

-       if (!target) {return;}
-       while(target.className !== 'slide') {
+       while(target && target.className !== 'slide') {

                target = target.parentNode;
        }
                target = target.parentNode;
        }

+       if (!target) {return;}

        target = target.parentNode;
        if (target !== this.dragged) {
                target.classList.add('dragover');
        target = target.parentNode;
        if (target !== this.dragged) {
                target.classList.add('dragover');