diff --git a/internal/js/view_support.js b/internal/js/view_support.js
index 272d358..f3a866e 100644
--- a/internal/js/view_support.js
+++ b/internal/js/view_support.js
@@ -156,6 +156,8 @@ function FaceToggle()
 // also deals with fullsecreen if needed
 function ViewImageOrVideo()
 {
+    // can happen if no content to display
+    if( ! document.viewing ) return
     if( document.viewing.type.name == 'Image' )
     {
         im.src='../' + document.viewing.FullPathOnFS