Fixing back-button/NaN-hash issue

diff --git a/web/viewer.js b/web/viewer.js
index 243afb7e5248d0beba7490f1cae79624cf8c64c5..809bd5ddaf1b415631a75fa108dc0166033cf86a 100644 (file)
--- a/web/viewer.js
+++ b/web/viewer.js
@@ -42,7 +42,7 @@ var PDFView = {
   set page(val) {
     var pages = this.pages;
     var input = document.getElementById('pageNumber');
-    if (val <= 0 || val > pages.length) {
+    if (!(0 < val && val <= pages.length)) {
       input.value = this.page;
       return;
     }
@@ -58,7 +58,7 @@ var PDFView = {
   },
 
   get page() {
-    return parseInt(document.location.hash.substring(1));
+    return parseInt(document.location.hash.substring(1)) || 1;
   },
 
   open: function(url, scale) {