--- loncom/homework/grades.pm	2003/07/28 18:04:39	1.126
+++ loncom/homework/grades.pm	2003/09/17 17:43:34	1.137
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.126 2003/07/28 18:04:39 ng Exp $
+# $Id: grades.pm,v 1.137 2003/09/17 17:43:34 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -96,6 +96,18 @@ sub get_fullname {
     return $fullname;
 }
 
+#--- Format fullname, username:domain if different for display
+#--- Use anywhere where the student names are listed
+sub nameUserString {
+    my ($type,$fullname,$uname,$udom) = @_;
+    if ($type eq 'header') {
+	return '<b>&nbsp;Fullname&nbsp;</b><font color="#999999">(Username)</font>&nbsp;';
+    } else {
+	return '&nbsp;'.$fullname.'<font color="#999999">&nbsp;('.$uname.
+	    ($ENV{'user.domain'} eq $udom ? '' : ' ('.$udom.')').')</font>';
+    }
+}
+
 #--- Get the partlist and the response type for a given problem. ---
 #--- Indicate if a response type is coded handgraded or not. ---
 sub response_type {
@@ -109,9 +121,8 @@ sub response_type {
 	    my ($responsetype,$part) = split(/_/,$_,2);
 	    my ($partid,$respid) = split(/_/,$part);
 	    $responsetype =~ s/response$//; # make it compatible w/ navmaps - should move to that!!
-#	    my ($value) = &Apache::lonnet::EXT('resource.'.$part.'.handgrade',$symb);
-#	    $handgrade{$part} = $responsetype.':'.($value eq 'yes' ? 'yes' : 'no'); #a bug $value is 'yes' regardless
-	    $handgrade{$part} = $responsetype.':'.(($allkeys =~ /parameter_$part\_handgrade/) ? 'yes' : 'no');
+	    my ($value) = &Apache::lonnet::EXT('resource.'.$part.'.handgrade',$symb);
+	    $handgrade{$part} = $responsetype.':'.($value eq 'yes' ? 'yes' : 'no'); 
 	    next if ($seen{$partid} > 0);
 	    $seen{$partid}++;
 	    push @partlist,$partid;
@@ -299,7 +310,7 @@ sub student_gradeStatus {
     my %record     = &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$udom,$uname);
     my %partstatus = ();
     foreach (@$partlist) {
-	my ($status,$foo)    = split(/_/,$record{"resource.$_.solved"},2);
+	my ($status,undef)   = split(/_/,$record{"resource.$_.solved"},2);
 	$status              = 'nothing' if ($status eq '');
 	$partstatus{$_}      = $status;
 	my $subkey           = "resource.$_.submitted_by";
@@ -506,8 +517,8 @@ LISTJAVASCRIPT
     my $saveStatus = $ENV{'form.Status'} eq '' ? 'Active' : $ENV{'form.Status'};
     $ENV{'form.Status'} = $saveStatus;
 
-    $gradeTable.='<input type="radio" name="lastSub" value="lastonly" '.$checklastsub.' /> last sub only'."\n".
-	'<input type="radio" name="lastSub" value="last" /> last sub & parts info'."\n".
+    $gradeTable.='<input type="radio" name="lastSub" value="lastonly" '.$checklastsub.' /> last submission only'."\n".
+	'<input type="radio" name="lastSub" value="last" /> last submission & parts info'."\n".
 	'<input type="radio" name="lastSub" value="datesub" /> by dates and submissions'."\n".
 	'<input type="radio" name="lastSub" value="all" /> all details'."\n".
 	'<input type="hidden" name="section"     value="'.$getsec.'" />'."\n".
@@ -533,15 +544,14 @@ LISTJAVASCRIPT
     $gradeTable.='<input type="button" '."\n".
 	'onClick="javascript:checkSelect(this.form.stuinfo);" '."\n".
 	'value="Next->" />'."\n";
-
+    $gradeTable.='<input type="checkbox" name="checkPlag" checked="on">Check For Plagiarism</input>';
     my (undef, undef, $fullname) = &getclasslist($getsec,'1');  
     $gradeTable.='<table border="0"><tr><td bgcolor="#777777">'.
 	'<table border="0"><tr bgcolor="#e6ffff">';
     my $loop = 0;
     while ($loop < 2) {
 	$gradeTable.='<td><b>&nbsp;No.</b>&nbsp;</td><td><b>&nbsp;Select&nbsp;</b></td>'.
-	    '<td><b>&nbsp;Fullname&nbsp;</b>'.
-	    '<font color="#999999">(Username)</font>&nbsp;</td>';
+	    '<td>'.&nameUserString('header').'</td>';
 	if ($ENV{'form.showgrading'} eq 'yes' && $submitonly ne 'all') {
 	    foreach (sort(@$partlist)) {
 		$gradeTable.='<td><b>&nbsp;Part '.(split(/_/))[0].' Status&nbsp;</b></td>';
@@ -578,8 +588,7 @@ LISTJAVASCRIPT
 	    $gradeTable.='<td align="right">'.$ctr.'&nbsp;</td>'.
 		'<td align="center"><input type=checkbox name="stuinfo" value="'.
 		$student.':'.$$fullname{$student}.'&nbsp;"></td>'."\n".
-		'<td>&nbsp;'.$$fullname{$student}.'&nbsp;'."\n".
-		'<font color="#999999">('.$uname.')</font></td>'."\n";
+		'<td>'.&nameUserString(undef,$$fullname{$student},$uname,$udom).'</td>'."\n";
 
 	    if ($ENV{'form.showgrading'} eq 'yes' && $submitonly ne 'all') {
 		foreach (sort keys(%status)) {
@@ -755,12 +764,13 @@ sub sub_page_js {
 	    for (i=0;i<=total;i++) {
 		for (j=0;j<parttot;j++) {
 		    var partid = formname["partid"+i+"_"+j].value;
-		    var selopt = formname["GD_SEL"+i+"_"+partid];
-		    if (selopt[0].selected) {
+		    if (formname["GD_SEL"+i+"_"+partid][0].selected) {
 			var points = formname["GD_BOX"+i+"_"+partid].value;
 			if (points == "") {
 			    var name = formname["name"+i].value;
-			    var resp = confirm("You did not assign a score for "+name+", part "+partid+". Continue?");
+			    var studentID = (name != '' ? name : formname["unamedom"+i].value);
+			    var resp = confirm("You did not assign a score for "+studentID+
+					       ", part "+partid+". Continue?");
 			    if (resp == false) {
 				formname["GD_BOX"+i+"_"+partid].focus();
 				return false;
@@ -788,8 +798,7 @@ sub sub_page_js {
 	var ptr = 0;
 	for (i=1;i<total;i++) {
 	    var partid = formname["q_"+i].value;
-	    var selopt = formname["GD_SEL"+i+"_"+partid];
-	    if (selopt[0].selected) {
+	    if (formname["GD_SEL"+i+"_"+partid][0].selected) {
 		var points = formname["GD_BOX"+i+"_"+partid].value;
 		var status = formname["solved"+i+"_"+partid].value;
 		if (points == "" && status != "correct_by_student") {
@@ -837,8 +846,8 @@ sub sub_page_kw_js {
     if (nret==null) return;
     formname.keywords.value = nret;
 
-    formname.refresh.value = "on";
     if (formname.keywords.value != "") {
+	formname.refresh.value = "on";
 	formname.submit();
     }
     return;
@@ -865,10 +874,9 @@ sub sub_page_kw_js {
     }
     var nret = prompt("Add selection to keyword list? Edit if desired.",cleantxt);
     if (nret==null) return;
-    var curlist = document.SCORE.keywords.value;
-    document.SCORE.keywords.value = curlist+" "+nret;
-    document.SCORE.refresh.value = "on";
+    document.SCORE.keywords.value = document.SCORE.keywords.value+" "+nret;
     if (document.SCORE.keywords.value != "") {
+	document.SCORE.refresh.value = "on";
 	document.SCORE.submit();
     }
     return;
@@ -885,8 +893,7 @@ sub sub_page_kw_js {
     var Nmsg  = msgform.savemsgN.value;
     savedMsgHeader(Nmsg,usrctr,fullname);
     var subject = msgform.msgsub.value;
-    var rtrchk  = document.SCORE["includemsg"+usrctr];
-    var msgchk = rtrchk.value;
+    var msgchk = document.SCORE["includemsg"+usrctr].value;
     re = /msgsub/;
     var shwsel = "";
     if (re.test(msgchk)) { shwsel = "checked" }
@@ -934,7 +941,6 @@ sub sub_page_kw_js {
 	height = 600;
 	scrollbar = "yes";
     }
-//    if (window.pWin) {window.pWin.close(); window.pWin=null}
     var xpos = (screen.width-600)/2;
     xpos = (xpos < 0) ? '0' : xpos;
     var ypos = (screen.height-height)/2-30;
@@ -943,6 +949,7 @@ sub sub_page_kw_js {
     pWin = window.open('', 'MessageCenter', 'toolbar=no,location=no,scrollbars='+scrollbar+',screenx='+xpos+',screeny='+ypos+',width=600,height='+height);
     pWin.focus();
     pDoc = pWin.document;
+    pDoc.open('text/html','replace');
     pDoc.write("<html><head>");
     pDoc.write("<title>Message Central</title>");
 
@@ -1029,6 +1036,7 @@ sub sub_page_kw_js {
     pDoc.write("<input type=\\"button\\" value=\\"Cancel\\" onClick=\\"self.close()\\"><br><br>");
     pDoc.write("</form>");
     pDoc.write("</body></html>");
+    pDoc.close();
 }
 
 //====================== Script for keyword highlight options ==============
@@ -1072,6 +1080,7 @@ sub sub_page_kw_js {
     hwdWin = window.open('', 'KeywordHighlightCentral', 'toolbar=no,location=no,scrollbars=no,width=400,height=300,screenx='+xpos+',screeny='+ypos);
     hwdWin.focus();
     var hDoc = hwdWin.document;
+    hDoc.open('text/html','replace');
     hDoc.write("<html><head>");
     hDoc.write("<title>Highlight Central</title>");
 
@@ -1120,6 +1129,7 @@ sub sub_page_kw_js {
     hDoc.write("<input type=\\"button\\" value=\\"Cancel\\" onClick=\\"self.close()\\"><br><br>");
     hDoc.write("</form>");
     hDoc.write("</body></html>");
+    hDoc.close();
   }
 
 </script>
@@ -1353,9 +1363,7 @@ KEYWORDS
     my $result='<table border="0" width=100%><tr><td bgcolor="#777777">'."\n".
 	'<table border="0" width=100%><tr bgcolor="#edffff"><td>'."\n";
 
-    $result.='<b>Fullname: </b>'.$ENV{'form.fullname'}.
-	'<font color="#999999">&nbsp; &nbsp;Username: '.$uname.
-	($ENV{'user.domain'} eq $udom ? '' : ' ('.$udom.')').'</font><br />'."\n";
+    $result.='<b>Fullname: </b>'.&nameUserString(undef,$ENV{'form.fullname'},$uname,$udom).'<br />'."\n";
     $result.='<input type="hidden" name="name'.$counter.
 	'" value="'.$ENV{'form.fullname'}.'" />'."\n";
 
@@ -1453,13 +1461,20 @@ KEYWORDS
 				my ($ressub,$subval) = split(/:/,$_,2);
                             # Similarity check
 				my $similar='';
-				my ($oname,$odom,$ocrsid,$oessay,$osim)=&most_similar($uname,$udom,$subval);
-				if ($osim) {
-				    $osim=int($osim*100.0);
-				    $similar='<hr /><h3><font color="#FF0000">Essay is '.$osim.
-					'% similar to an essay by '.&Apache::loncommon::plainname($oname,$odom).
-					'</font></h3><blockquote><i>'.
-					&keywords_highlight($oessay).'</i></blockquote><hr />';
+				my $oname;
+				my $odom;
+				my $ocrsid;
+				my $oessay;
+				my $osim;
+				if($ENV{'form.checkPlag'}){
+				    ($oname,$odom,$ocrsid,$oessay,$osim)=&most_similar($uname,$udom,$subval);
+				    if ($osim) {
+					$osim=int($osim*100.0);
+					$similar='<hr /><h3><font color="#FF0000">Essay is '.$osim.
+					    '% similar to an essay by '.&Apache::loncommon::plainname($oname,$odom).
+					    '</font></h3><blockquote><i>'.
+					    &keywords_highlight($oessay).'</i></blockquote><hr />';
+				    }
 				}
 				$lastsubonly.='<tr><td bgcolor="#ffffe6"><b>Part '.
 				    $partid.'</b> <font color="#999999">( ID '.$respid.
@@ -1472,7 +1487,7 @@ KEYWORDS
 				     'this file may contain virusses</font><br />':'').
 				     '<b>Submitted Answer: </b>'.
 				     &cleanRecord($subval,$responsetype,$symb).
-				      '<br /><br />'.$similar."\n"
+				     '<br /><br />'.$similar."\n"
 				     if ($ENV{'form.lastSub'} eq 'lastonly' || 
 					 ($ENV{'form.lastSub'} eq 'hdgrade' && 
 					  $$handgrade{$part} =~ /:yes$/));
@@ -1533,17 +1548,21 @@ KEYWORDS
 
     my %seen = ();
     my @partlist;
+    my @gradePartRespid;
     for (sort keys(%$handgrade)) {
 	my ($partid,$respid) = split(/_/);
 	next if ($seen{$partid} > 0);
 	$seen{$partid}++;
 	next if ($$handgrade{$_} =~ /:no$/ && $ENV{'form.lastSub'} =~ /^(hdgrade)$/);
 	push @partlist,$partid;
+	push @gradePartRespid,$partid.'.'.$respid;
 
 	$request->print(&gradeBox($request,$symb,$uname,$udom,$counter,$partid,\%record));
     }
     $result='<input type="hidden" name="partlist'.$counter.
 	'" value="'.(join ":",@partlist).'" />'."\n";
+    $result.='<input type="hidden" name="gradePartRespid'.
+	'" value="'.(join ":",@gradePartRespid).'" />'."\n" if ($counter == 0);
     my $ctr = 0;
     while ($ctr < scalar(@partlist)) {
 	$result.='<input type="hidden" name="partid'.$counter.'_'.$ctr.'" value="'.
@@ -1769,21 +1788,19 @@ sub processHandGrade {
 	}
     }
     $ctr = 0;
-    my ($partlist,$handgrade) = &response_type($ENV{'form.url'},$symb);
     @parsedlist = reverse @parsedlist if ($button eq 'Previous');
     foreach my $student (@parsedlist) {
 	my ($uname,$udom) = split(/:/,$student);
 	if ($ENV{'form.submitonly'} eq 'yes') {
-	    my (%status) = &student_gradeStatus($ENV{'form.url'},$symb,$udom,$uname,$partlist) ;
+	    my %record = &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$udom,$uname);
 	    my $statusflg = '';
-	    foreach (keys(%status)) {
-		$statusflg = 1 if ($status{$_} ne 'nothing');
-		my ($foo,$partid,$foo1) = split(/\./);
-		$statusflg = '' if ($status{'resource.'.$partid.'.submitted_by'} ne '');
+	    foreach (split(/:/,$ENV{'form.gradePartRespid'})){
+		$statusflg = 1 if (exists ($record{'resource.'.$_.'.submission'}));
 	    }
 	    next if ($statusflg eq '');
 	}
 	push @nextlist,$student if ($ctr < $ntstu);
+	last if ($ctr == $ntstu);
 	$ctr++;
     }
 
@@ -2121,7 +2138,7 @@ sub viewgrades {
     $result.= '<h3>Assign Grade to Specific Students in '.$sectionClass;
     $result.= '<table border=0><tr><td bgcolor="#777777">'."\n".
 	'<table border=0><tr bgcolor="#deffff"><td>&nbsp;<b>No.</b>&nbsp;</td>'.
-	'<td>&nbsp;<b>Fullname</b> <font color="#999999">(Username)</font></td>'."\n";
+	'<td>'.&nameUserString('header')."</td>\n";
     my (@parts) = sort(&getpartlist($url));
     foreach my $part (@parts) {
 	my $display=&Apache::lonnet::metadata($url,$part.'.display');
@@ -2165,7 +2182,7 @@ sub viewgrades {
 
 #--- call by previous routine to display each student
 sub viewstudentgrade {
-    my ($$url,$symb,$courseid,$student,$fullname,$parts,$weight,$ctr) = @_;
+    my ($url,$symb,$courseid,$student,$fullname,$parts,$weight,$ctr) = @_;
     my ($uname,$udom) = split(/:/,$student);
     $student=~s/:/_/;
     my %record=&Apache::lonnet::restore($symb,$courseid,$udom,$uname);
@@ -2221,8 +2238,9 @@ sub editgrades {
     $title.='<font size=+1><b>Section: </b>'.$ENV{'form.section'}.'</font>'."\n";
 
     my $result= '<table border="0"><tr><td bgcolor="#777777">'."\n";
-    $result.= '<table border="0"><tr bgcolor="#deffff"><td rowspan=2>&nbsp;<b>No.</b>&nbsp;</td>'.
-	'<td rowspan=2>&nbsp;<b>Fullname</b>&nbsp;<font color="#999999">(username)</font></td>'."\n";
+    $result.= '<table border="0"><tr bgcolor="#deffff">'.
+	'<td rowspan=2 valign="center">&nbsp;<b>No.</b>&nbsp;</td>'.
+	'<td rowspan=2 valign="center">'.&nameUserString('header')."</td>\n";
 
     my %scoreptr = (
 		    'correct'  =>'correct_by_override',
@@ -2281,8 +2299,7 @@ sub editgrades {
 	my ($uname,$udom)=split(/_/,$user);
 	my %newrecord;
 	my $updateflag = 0;
-	$line .= '<td>&nbsp;'.$$fullname{$usercolon}.
-	    '&nbsp<font color="#999999">('.$uname.($udom eq $ENV{'user.domain'} ? '' : '$udom').')</font></td>';
+	$line .= '<td>'.&nameUserString(undef,$$fullname{$usercolon},$uname,$udom).'</td>';
 	my $usec=$classlist->{"$uname:$udom"}[5];
 	if (!&canmodify($usec)) {
 	    my $numcols=scalar(@partid)*4+2;
@@ -2500,7 +2517,6 @@ to this page if the data selected is ins
 $javascript
 </script>
 ENDPICK
-    $request->print(&show_grading_menu_form($symb,$url));
     return '';
 
 }
@@ -2717,7 +2733,9 @@ LISTJAVASCRIPT
     $result.='<form action="/adm/grades" method="post" name="displayPage">'."\n";
     $result.='&nbsp;<b>Problems from:</b> <select name="selectpage">'."\n";
     my ($titles,$symbx) = &getSymbMap($request);
-    my ($curpage,$type,$mapId) = ($symb =~ /(.*?\.(page|sequence))___(\d+)___/); 
+    my ($curpage) =&Apache::lonnet::decode_symb($symb); 
+#    my ($curpage,$mapId) =&Apache::lonnet::decode_symb($symb); 
+#    my $type=($curpage =~ /\.(page|sequence)/);
     my $ctr=0;
     foreach (@$titles) {
 	my ($minder,$showtitle) = ($_ =~ /(\d+)\.(.*)/);
@@ -2761,9 +2779,9 @@ LISTJAVASCRIPT
 	'<table border="0"><tr><td bgcolor="#777777">'.
 	'<table border="0"><tr bgcolor="#e6ffff">'.
 	'<td align="right">&nbsp;<b>No.</b></td>'.
-	'<td><b>&nbsp;Fullname <font color="#999999">(username)</font></b></td>'.
+	'<td>'.&nameUserString('header').'</td>'.
 	'<td align="right">&nbsp;<b>No.</b></td>'.
-	'<td><b>&nbsp;Fullname <font color="#999999">(username)</font></b></td></tr>';
+	'<td>'.&nameUserString('header').'</td></tr>';
  
     my (undef,undef,$fullname) = &getclasslist($getsec,'1');
     my $ptr = 1;
@@ -2771,8 +2789,8 @@ LISTJAVASCRIPT
 	my ($uname,$udom) = split(/:/,$student);
 	$studentTable.=($ptr%2 == 1 ? '<tr bgcolor="#ffffe6">' : '</td>');
 	$studentTable.='<td align="right">'.$ptr.'&nbsp;</td>';
-	$studentTable.='<td>&nbsp;<input type="radio" name="student" value="'.$student.'" /> '.$$fullname{$student}.
-	    '<font color="#999999"> ('.$uname.($udom eq $cdom ? '':':'.$udom).')</font>'."\n";
+	$studentTable.='<td>&nbsp;<input type="radio" name="student" value="'.$student.'" /> '
+	    .&nameUserString(undef,$$fullname{$student},$uname,$udom)."\n";
 	$studentTable.=($ptr%2 == 0 ? '</td></tr>' : '');
 	$ptr++;
     }
@@ -2789,9 +2807,7 @@ LISTJAVASCRIPT
 
 sub getSymbMap {
     my ($request) = @_;
-    my $navmap = Apache::lonnavmaps::navmap-> new($ENV{'request.course.fn'}.'.db',
-						  $ENV{'request.course.fn'}.'_parms.db');
-    $navmap->init();
+    my $navmap = Apache::lonnavmaps::navmap->new();
 
     my %symbx = ();
     my @titles = ();
@@ -2831,15 +2847,13 @@ sub displayPage {
 	return;
     }
     my $result='<h3><font color="#339933">&nbsp;'.$ENV{'form.title'}.'</font></h3>';
-    $result.='<h3>&nbsp;Student: '.$$fullname{$ENV{'form.student'}}.
-	'<font color="#999999"> ('.$uname.($udom eq $cdom ? '':':'.$udom).')</font></h3>'."\n";
-
+    $result.='<h3>&nbsp;Student: '.&nameUserString(undef,$$fullname{$ENV{'form.student'}},$uname,$udom).
+	'</h3>'."\n";
     &sub_page_js($request);
     $request->print($result);
 
-    my $navmap = Apache::lonnavmaps::navmap-> new($ENV{'request.course.fn'}.'.db',
-						  $ENV{'request.course.fn'}.'_parms.db',1, 1);
-    my ($mapUrl, $id, $resUrl) = split(/___/, $ENV{'form.page'});
+    my $navmap = Apache::lonnavmaps::navmap->new();
+    my ($mapUrl, $id, $resUrl)=&Apache::lonnet::decode_symb($ENV{'form.page'});
     my $map = $navmap->getResourceByUrl($resUrl); # add to navmaps
 
     my $iterator = $navmap->getIterator($map->map_start(),
@@ -2995,14 +3009,13 @@ sub updateGradeByPage {
 	return;
     }
     my $result='<h3><font color="#339933">&nbsp;'.$ENV{'form.title'}.'</font></h3>';
-    $result.='<h3>&nbsp;Student: '.$ENV{'form.fullname'}.
-	'<font color="#999999"> ('.$uname.($udom eq $cdom ? '':':'.$udom).')</font></h3>'."\n";
+    $result.='<h3>&nbsp;Student: '.&nameUserString(undef,$ENV{'form.fullname'},$uname,$udom).
+	'</h3>'."\n";
 
     $request->print($result);
 
-    my $navmap = Apache::lonnavmaps::navmap-> new($ENV{'request.course.fn'}.'.db',
-						  $ENV{'request.course.fn'}.'_parms.db',1, 1);
-    my ($mapUrl, $id, $resUrl) = split(/___/, $ENV{'form.page'});
+    my $navmap = Apache::lonnavmaps::navmap->new();
+    my ($mapUrl, $id, $resUrl) = &Apache::lonnet::decode_symb( $ENV{'form.page'});
     my $map = $navmap->getResourceByUrl($resUrl); # add to navmaps
 
     my $iterator = $navmap->getIterator($map->map_start(),
@@ -3124,7 +3137,7 @@ sub getSequenceDropDown {
     my ($request,$symb)=@_;
     my $result='<select name="selectpage">'."\n";
     my ($titles,$symbx) = &getSymbMap($request);
-    my ($curpage,$type,$mapId) = ($symb =~ /(.*?\.(page|sequence))___(\d+)___/); 
+    my ($curpage)=&Apache::lonnet::decode_symb($symb); 
     my $ctr=0;
     foreach (@$titles) {
 	my ($minder,$showtitle) = ($_ =~ /(\d+)\.(.*)/);
@@ -3310,7 +3323,7 @@ sub scantron_filter {
 
 sub scantron_process_students {
     my ($r) = @_;
-    my (undef,undef,$sequence)=split(/___/,$ENV{'form.selectpage'});
+    my (undef,undef,$sequence)=&Apache::lonnet::decode_symb($ENV{'form.selectpage'});
     my ($symb,$url)=&get_symb_and_url($r);
     if (!$symb) {return '';}
     my $default_form_data=&defaultFormData($symb,$url);
@@ -3320,7 +3333,7 @@ sub scantron_process_students {
     my @scanlines=<$scanlines>;
     my $classlist=&Apache::loncoursedata::get_classlist();
     my %idmap=&username_to_idmap($classlist);
-    my $navmap=Apache::lonnavmaps::navmap->new($ENV{'request.course.fn'}.'.db',$ENV{'request.course.fn'}.'_parms.db',1, 1);
+    my $navmap=Apache::lonnavmaps::navmap->new();
     my $map=$navmap->getResourceByUrl($sequence);
     my @resources=$navmap->retrieveResources($map,\&scantron_filter,1,0);
     $r->print("geto ".scalar(@resources)."<br />");
@@ -3596,7 +3609,7 @@ sub handler {
     my $command=$ENV{'form.command'};
     if (!$url) {
 	my ($temp1,$temp2);
-	($temp1,$temp2,$ENV{'form.url'})=split(/___/,$symb);
+	($temp1,$temp2,$ENV{'form.url'})=&Apache::lonnet::decode_symb($symb);
 	$url = $ENV{'form.url'};
     }
     &send_header($request);
@@ -3609,7 +3622,7 @@ sub handler {
 		my ($tsymb,$tuname,$tudom,$tcrsid)=
 		    &Apache::lonnet::checkin($token);
 		if ($tsymb) {
-		    my ($map,$id,$url)=split(/\_\_\_/,$tsymb);
+		    my ($map,$id,$url)=&Apache::lonnet::decode_symb($tsymb);
 		    if (&Apache::lonnet::allowed('mgr',$tcrsid)) {
 			$request->print(&Apache::lonnet::ssi_body('/res/'.$url,
 					  ('grade_username' => $tuname,