1 files changed, 1 insertions, 1 deletions

diff --git a/js/RrdGfxPdf.js b/js/RrdGfxPdf.js
index 230d441..cbc552f 100644
--- a/js/RrdGfxPdf.js
+++ b/js/RrdGfxPdf.js
@@ -776,7 +776,7 @@ RrdGfxPdf.prototype._beginpage = function(orientation, size)
         this.FontFamily = '';
         // Check page size and orientation
         if(orientation=='') orientation = this.DefOrientation;
-        else orientation = strtoupper(orientation[0]);
+        else orientation = orientation[0].toUpperCase();
 
         if(size=='') size = this.DefPageSize;
         else size = this._getpagesize(size);