--- loncom/interface/lonhtmlcommon.pm	2004/09/10 17:58:01	1.89
+++ loncom/interface/lonhtmlcommon.pm	2004/09/29 14:50:43	1.90
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common html routines
 #
-# $Id: lonhtmlcommon.pm,v 1.89 2004/09/10 17:58:01 banghart Exp $
+# $Id: lonhtmlcommon.pm,v 1.90 2004/09/29 14:50:43 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -524,6 +524,27 @@ sub javascript_nothing {
     }
     return $nothing;
 }
+
+##############################################
+##############################################
+sub javascript_docopen {
+    # safari does not understand document.open() and loads "text/html"
+    my $nothing = "''";
+    my $user_browser;
+    my $user_os;
+    $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
+    $user_os      = $ENV{'browser.os'}   if (exists($ENV{'browser.os'}));
+    if (! defined($user_browser) || ! defined($user_os)) {
+        (undef,$user_browser,undef,undef,undef,$user_os) = 
+                           &Apache::loncommon::decode_user_agent();
+    }
+    if ($user_browser eq 'safari' && $user_os =~ 'mac') {
+        $nothing = "document.clear()";
+    } else {
+	$nothing = "document.open('text/html','replace')";
+    }
+    return $nothing;
+}
 
 
 ##############################################