--- loncom/homework/lonhomework.pm	2008/07/28 05:26:00	1.296
+++ loncom/homework/lonhomework.pm	2009/03/04 16:00:14	1.304
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Homework handler
 #
-# $Id: lonhomework.pm,v 1.296 2008/07/28 05:26:00 raeburn Exp $
+# $Id: lonhomework.pm,v 1.304 2009/03/04 16:00:14 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -209,58 +209,6 @@ sub proctor_checked_in {
     return 0;
 }
 
-sub check_ip_acc {
-    my ($acc)=@_;
-    &Apache::lonxml::debug("acc is $acc");
-    if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) { 
-	return 1;
-    }
-    my $allowed=0;
-    my $ip=$env{'request.host'} || $ENV{'REMOTE_ADDR'};
-
-    my $name;
-    foreach my $pattern (split(',',$acc)) {
-	$pattern =~ s/^\s*//;
-	$pattern =~ s/\s*$//;
-	if ($pattern =~ /\*$/) {
-	    #35.8.*
-	    $pattern=~s/\*//;
-	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
-	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
-	    #35.8.3.[34-56]
-	    my $low=$2;
-	    my $high=$3;
-	    $pattern=$1;
-	    if ($ip =~ /^\Q$pattern\E/) { 
-		my $last=(split(/\./,$ip))[3];
-		if ($last <=$high && $last >=$low) { $allowed=1; }
-	    }
-	} elsif ($pattern =~ /^\*/) {
-	    #*.msu.edu
-	    $pattern=~s/\*//;
-	    if (!defined($name)) {
-		use Socket;
-		my $netaddr=inet_aton($ip);
-		($name)=gethostbyaddr($netaddr,AF_INET);
-	    }
-	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
-	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
-	    #127.0.0.1
-	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
-	} else {
-	    #some.name.com
-	    if (!defined($name)) {
-		use Socket;
-		my $netaddr=inet_aton($ip);
-		($name)=gethostbyaddr($netaddr,AF_INET);
-	    }
-	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
-	}
-	if ($allowed) { last; }
-    }
-    return $allowed;
-}
-
 sub check_slot_access {
     my ($id,$type)=@_;
 
@@ -307,7 +255,7 @@ sub check_slot_access {
 	&Apache::lonhomework::showhash(%slot);
 	if ($slot{'starttime'} < time &&
 	    $slot{'endtime'} > time &&
-	    &check_ip_acc($slot{'ip'})) {
+	    &Apache::loncommon::check_ip_acc($slot{'ip'})) {
 	    &Apache::lonxml::debug("$slot is good");
 	    $slotstatus='NEEDS_CHECKIN';
 	    $returned_slot=\%slot;
@@ -421,7 +369,7 @@ sub check_access {
     #if ($env{'request.state'} ne "construct" && $symb ne '') {
     if ($env{'request.state'} ne "construct") {
         my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
-	my $allowed=&check_ip_acc($idacc);
+	my $allowed=&Apache::loncommon::check_ip_acc($idacc);
 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
 	    $status='INVALID_ACCESS';
 	    $date=&mt("can not be accessed from your location.");
@@ -923,12 +871,6 @@ sub editxmlmode {
 	&renderpage($request,$file);
     } else {
 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
-	my $xml_help = '<table><tr><td>'.
-	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
-						    "Problem Editing Help").
-						    '</td><td>'.
-       &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
-                '</td></tr></table>';
 	if ($cols > 80) { $cols = 80; }
 	if ($cols < 70) { $cols = 70; }
 	if ($rows < 20) { $rows = 20; }
@@ -936,7 +878,7 @@ sub editxmlmode {
 	    &Apache::edit::js_change_detection(). 
 	    &Apache::loncommon::resize_textarea_js().
             &Apache::structuretags::setmode_javascript().
-            &Apache::lonhtmlcommon::dragmath_js();
+            &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
 	my $only_body =  ($env{'environment.remote'} eq 'off')? 0 : 1;
 	my $dragmath_button = 
             &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
@@ -957,7 +899,7 @@ sub editxmlmode {
               <table class="LC_edit_problem_header_title"><tr><td>
                '.&mt('Problem Editing').&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'
                 </td><td align="right">
-                  '.&Apache::loncommon::helpLatexCheatsheet().'
+                  '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
                 </td></tr>
               </table>
               <div class="LC_edit_problem_discards">
@@ -1192,7 +1134,7 @@ sub update_construct_style {
 	&& !defined($env{'form.newrandomization'})) {
 	if ((!$env{'form.style_file'} && $env{'construct.style'})
 	    ||$env{'form.clear_style_file'}) {
-	    &Apache::lonnet::delenv('construct\\.style');
+	    &Apache::lonnet::delenv('construct.style');
 	} elsif ($env{'form.style_file'} 
 	    && $env{'construct.style'} ne $env{'form.style_file'}) {
 	    &Apache::lonnet::appenv({'construct.style' =>