Merge pull request #362 from mohansun/patch-2

fix for the issue:https://github.com/andreasgal/pdf.js/issues/360

web/viewer.js

@@ -28,6 +28,9 @@ var PDFView = {
     for (var i = 0; i < pages.length; i++)
       pages[i].update(val / 100 * cssUnits);
       
+    if(document.location.hash == '#' + this.page)
+      this.pages[this.page-1].draw();
+    else
       // Jump the scroll position to the correct page.
       document.location.hash = this.page;