diff --git a/app/pub/scripts/anviewer.js b/app/pub/scripts/anviewer.js
index 429ddbb..01401ad 100644
--- a/app/pub/scripts/anviewer.js
+++ b/app/pub/scripts/anviewer.js
@@ -142,11 +142,11 @@ function startpdfviewer(newpdf){
 
   currpdf =  getzoom('currpdf');
   
-  if (currpdf !== null & currpdf == newpdf){
+  if (currpdf == newpdf){
     
     czoom = getzoom('pdfscale');
     
-    if (czoom != null & czoom > 10) {
+    if (czoom !== null & czoom > 10) {
         newpdfzoom(czoom);
     }