Fix for #1153

diff --git a/src/event.js b/src/event.js
index daa3d2e52401bc10d2bd19c9289dabecbb7979ec..919dbf8e0c741054e74d8c713beed01e71d0a5e2 100644 (file)
--- a/src/event.js
+++ b/src/event.js
@@ -266,8 +266,8 @@ jQuery.event = {
                // Calculate pageX/Y if missing and clientX/Y available
                if ( event.pageX == null && event.clientX != null ) {
                        var e = document.documentElement, b = document.body;
-                       event.pageX = event.clientX + (e && e.scrollLeft || b.scrollLeft || 0);
-                       event.pageY = event.clientY + (e && e.scrollTop || b.scrollTop || 0);
+                       event.pageX = event.clientX + (e && e.scrollLeft || b && b.scrollLeft || 0);
+                       event.pageY = event.clientY + (e && e.scrollTop || b && b.scrollTop || 0);
                }
                        
                // Add which for key events