--- loncom/homework/functionplotresponse.pm	2012/08/17 13:08:11	1.98
+++ loncom/homework/functionplotresponse.pm	2012/08/17 18:02:15	1.99
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
 # Functionplot responses
 #
-# $Id: functionplotresponse.pm,v 1.98 2012/08/17 13:08:11 www Exp $
+# $Id: functionplotresponse.pm,v 1.99 2012/08/17 18:02:15 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -49,7 +49,10 @@ BEGIN {
 # Return a true value if HTML5 should be used.
 
 sub useHTML5 {
-    return 1;
+    if  ($env{'browser.type'} eq 'chrome') { return 1; }
+    if (($env{'browser.type'} eq 'safari') &&
+        ($env{'browser.os'} eq 'mac')) { return 1; }
+    return 0;
 }
 
 #