diff --git a/extensions/calpa/Docs/javadoc/calpa/html/CalHTMLObserver.html b/extensions/calpa/Docs/javadoc/calpa/html/CalHTMLObserver.html
index 555a3d3..9d4ea80 100644
--- a/extensions/calpa/Docs/javadoc/calpa/html/CalHTMLObserver.html
+++ b/extensions/calpa/Docs/javadoc/calpa/html/CalHTMLObserver.html
@@ -305,12 +305,12 @@ public void <B>historyUpdate</B>(<A HREF="../../calpa/html/CalHTMLPane.html">Cal
  <code>if (position == CalCons.AT_HISTORY_MIDDLE) { <BR>
             &nbsp;&nbsp;&nbsp;&nbsp;//...enable both the 'back' and 'forward' buttons <BR>
        } else { <BR>
-          &nbsp;&nbsp;&nbsp;&nbsp;if ((position & CalCons.AT_HISTORY_TOP) > 0) { <BR>
+          &nbsp;&nbsp;&nbsp;&nbsp;if ((position &amp; CalCons.AT_HISTORY_TOP) > 0) { <BR>
               &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//...disable the 'forward' button  <BR>
           &nbsp;&nbsp;&nbsp;&nbsp;} else {  <BR>
               &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//...enable the 'forward' button  <BR>
           &nbsp;&nbsp;&nbsp;&nbsp;}  <BR>
-          &nbsp;&nbsp;&nbsp;&nbsp;if ((position & CalCons.AT_HISTORY_BOTTOM) > 0) {  <BR>
+          &nbsp;&nbsp;&nbsp;&nbsp;if ((position &amp; CalCons.AT_HISTORY_BOTTOM) > 0) {  <BR>
               &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//...disable the 'back' button   <BR>
           &nbsp;&nbsp;&nbsp;&nbsp;} else {   <BR>
               &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//...enable the 'back' button   <BR>