diff --git a/swad_account.c b/swad_account.c
index 1ac4164c..213108b6 100644
--- a/swad_account.c
+++ b/swad_account.c
@@ -279,17 +279,16 @@ static void Acc_WriteRowEmptyAccount (unsigned NumUsr,const char *ID,struct UsrD
 
    /***** Write number of user in the list *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td rowspan=\"2\""
-		      " class=\"USR_LIST_NUM_N RIGHT_TOP COLOR%u\">"
-		      "%u",
-	    Gbl.RowEvenOdd,NumUsr);
+
+   Tbl_StartCellAttr ("rowspan=\"2\" class=\"USR_LIST_NUM_N RIGHT_TOP COLOR%u\"",
+	              Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%u",NumUsr);
    Tbl_EndCell ();
 
    /***** Write user's ID and name *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT_N LEFT_TOP COLOR%u\">"
-		      "%s: %s<br />"
+   Tbl_StartCellAttr ("class=\"DAT_N LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%s: %s<br />"
 		      "%s: ",
-	    Gbl.RowEvenOdd,
 	    Txt_ID,ID,
 	    Txt_Name);
    if (UsrDat->FullName[0])
@@ -299,24 +298,24 @@ static void Acc_WriteRowEmptyAccount (unsigned NumUsr,const char *ID,struct UsrD
    Tbl_EndCell ();
 
    /***** Button to login with this account *****/
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP COLOR%u\">",
-	    Gbl.RowEvenOdd);
+   Tbl_StartCellAttr ("class=\"RIGHT_TOP COLOR%u\"",Gbl.RowEvenOdd);
    Frm_StartForm (ActLogInNew);
    Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
    Btn_PutCreateButtonInline (Txt_Its_me);
    Frm_EndForm ();
    Tbl_EndCell ();
+
    Tbl_EndRow ();
+   Tbl_StartRow ();
 
    /***** Courses of this user *****/
-   Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP COLOR%u\">",
-	    Gbl.RowEvenOdd);
+   Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
    UsrDat->Sex = Usr_SEX_UNKNOWN;
    Crs_GetAndWriteCrssOfAUsr (UsrDat,Rol_TCH);
    Crs_GetAndWriteCrssOfAUsr (UsrDat,Rol_NET);
    Crs_GetAndWriteCrssOfAUsr (UsrDat,Rol_STD);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
   }
 
@@ -368,13 +367,15 @@ static void Acc_ShowFormRequestNewAccountWithParams (const char *NewNicknameWith
    else
       NewNicknameWithArroba[0] = '\0';
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-	              "<label for=\"NewNick\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"NewNick\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],
             Txt_Nickname);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" id=\"NewNick\" name=\"NewNick\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" id=\"NewNick\" name=\"NewNick\""
                       " size=\"18\" maxlength=\"%u\""
                       " placeholder=\"%s\" value=\"%s\""
                       " required=\"required\" />",
@@ -382,17 +383,20 @@ static void Acc_ShowFormRequestNewAccountWithParams (const char *NewNicknameWith
             Txt_HELP_nickname,
             NewNicknameWithArroba);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Email *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-	              "<label for=\"NewEmail\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"NewEmail\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],
             Txt_Email);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"email\" id=\"NewEmail\" name=\"NewEmail\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"email\" id=\"NewEmail\" name=\"NewEmail\""
                       " size=\"18\" maxlength=\"%u\""
                       " placeholder=\"%s\" value=\"%s\""
                       " required=\"required\" />",
@@ -400,6 +404,7 @@ static void Acc_ShowFormRequestNewAccountWithParams (const char *NewNicknameWith
             Txt_HELP_email,
             NewEmail);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Password *****/
diff --git a/swad_agenda.c b/swad_agenda.c
index 745aa038..ecc39c85 100644
--- a/swad_agenda.c
+++ b/swad_agenda.c
@@ -748,36 +748,34 @@ static void Agd_ShowOneEvent (Agd_AgendaType_t AgendaType,long AgdCod)
 	StartEndTime <= (Dat_StartEndTime_t) (Dat_NUM_START_END_TIME - 1);
 	StartEndTime++)
      {
-      fprintf (Gbl.F.Out,"<td id=\"agd_date_%u_%u\""
-	                 " class=\"%s LEFT_BOTTOM COLOR%u\">"
-			 "<script type=\"text/javascript\">"
+      Tbl_StartCellAttr ("id=\"agd_date_%u_%u\" class=\"%s LEFT_BOTTOM COLOR%u\"",
+			 (unsigned) StartEndTime,UniqueId,
+			 AgdEvent.Hidden ? Dat_TimeStatusClassHidden[AgdEvent.TimeStatus] :
+					   Dat_TimeStatusClassVisible[AgdEvent.TimeStatus],
+			 Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"<script type=\"text/javascript\">"
 			 "writeLocalDateHMSFromUTC('agd_date_%u_%u',%ld,"
 			 "%u,'<br />','%s',true,true,0x6);"
 			 "</script>",
 	       (unsigned) StartEndTime,UniqueId,
-	       AgdEvent.Hidden ? Dat_TimeStatusClassHidden[AgdEvent.TimeStatus] :
-				 Dat_TimeStatusClassVisible[AgdEvent.TimeStatus],
-	       Gbl.RowEvenOdd,
-	       (unsigned) StartEndTime,UniqueId,
 	       AgdEvent.TimeUTC[StartEndTime],
 	       (unsigned) Gbl.Prefs.DateFormat,Txt_Today);
       Tbl_EndCell ();
      }
 
    /* Event */
-   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_TOP COLOR%u\">",
-            AgdEvent.Hidden ? "ASG_TITLE_LIGHT" :
-        	              "ASG_TITLE",
-            Gbl.RowEvenOdd);
+   Tbl_StartCellAttr ("class=\"%s LEFT_TOP COLOR%u\"",
+		      AgdEvent.Hidden ? "ASG_TITLE_LIGHT" :
+				        "ASG_TITLE",
+		      Gbl.RowEvenOdd);
    Lay_StartArticle (Anchor);
    fprintf (Gbl.F.Out,"%s",AgdEvent.Event);
    Lay_EndArticle ();
    Tbl_EndCell ();
 
    /* Location */
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP COLOR%u\">"
-                      "<div class=\"%s\">%s</div>",
-            Gbl.RowEvenOdd,
+   Tbl_StartCellAttr ("class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"<div class=\"%s\">%s</div>",
             AgdEvent.Hidden ? "ASG_TITLE_LIGHT" :
         	              "ASG_TITLE",
             AgdEvent.Location);
@@ -787,20 +785,18 @@ static void Agd_ShowOneEvent (Agd_AgendaType_t AgendaType,long AgdCod)
 
    /***** Write second row of data of this event *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP COLOR%u\">",
-            Gbl.RowEvenOdd);
 
-   /* Forms to remove/edit this event */
+   Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
    switch (AgendaType)
      {
       case Agd_MY_AGENDA_TODAY:
       case Agd_MY_AGENDA:
+         /* Forms to remove/edit this event */
          Agd_PutFormsToRemEditOneEvent (&AgdEvent,Anchor);
          break;
       default:
 	 break;
      }
-
    Tbl_EndCell ();
 
    /* Text of the event */
@@ -808,13 +804,14 @@ static void Agd_ShowOneEvent (Agd_AgendaType_t AgendaType,long AgdCod)
    Str_ChangeFormat (Str_FROM_HTML,Str_TO_RIGOROUS_HTML,
                      Txt,Cns_MAX_BYTES_TEXT,false);	// Convert from HTML to recpectful HTML
    Str_InsertLinks (Txt,Cns_MAX_BYTES_TEXT,60);	// Insert links
-   fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP COLOR%u\">"
-	              "<div class=\"PAR %s\">%s</div>",
-            Gbl.RowEvenOdd,
+
+   Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"<div class=\"PAR %s\">%s</div>",
             AgdEvent.Hidden ? "DAT_LIGHT" :
         	              "DAT",
             Txt);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Free anchor string *****/
@@ -1503,32 +1500,38 @@ void Agd_RequestCreatOrEditEvent (void)
 
    /***** Event *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-	              "<label for=\"Event\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"Event\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],
             Txt_Event);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" id=\"Event\" name=\"Event\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" id=\"Event\" name=\"Event\""
                       " size=\"45\" maxlength=\"%u\" value=\"%s\""
                       " required=\"required\" />",
             Agd_MAX_CHARS_EVENT,AgdEvent.Event);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Location *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-	              "<label for=\"Location\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"Location\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],
             Txt_Location);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" id=\"Location\" name=\"Location\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" id=\"Location\" name=\"Location\""
                       " size=\"45\" maxlength=\"%u\" value=\"%s\""
                       " required=\"required\" />",
             Agd_MAX_CHARS_LOCATION,AgdEvent.Location);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Start and end dates *****/
@@ -1537,18 +1540,21 @@ void Agd_RequestCreatOrEditEvent (void)
 
    /***** Text *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">"
-	              "<label for=\"Txt\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_TOP\"");
+   fprintf (Gbl.F.Out,"<label for=\"Txt\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],
             Txt_Description);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">"
-                      "<textarea id=\"Txt\" name=\"Txt\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_TOP\"");
+   fprintf (Gbl.F.Out,"<textarea id=\"Txt\" name=\"Txt\""
                       " cols=\"60\" rows=\"10\">");
    if (!ItsANewEvent)
       fprintf (Gbl.F.Out,"%s",Txt);
    fprintf (Gbl.F.Out,"</textarea>");
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** End table, send button and end box *****/
diff --git a/swad_announcement.c b/swad_announcement.c
index 2470fd16..956dda19 100644
--- a/swad_announcement.c
+++ b/swad_announcement.c
@@ -414,12 +414,12 @@ void Ann_ShowFormAnnouncement (void)
 
    /***** Users' roles who can view the announcement *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP\">"
-                      "%s: ",
-            The_ClassFormInBox[Gbl.Prefs.Theme],
-            Txt_Users);
+
+   Tbl_StartCellAttr ("class=\"%s RIGHT_TOP\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
+   fprintf (Gbl.F.Out,"%s: ",Txt_Users);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP\">");
+
+   Tbl_StartCellAttr ("class=\"DAT LEFT_TOP\"");
    Rol_WriteSelectorRoles (1 << Rol_UNK     |
                            1 << Rol_GST     |
                            1 << Rol_STD     |
@@ -432,6 +432,7 @@ void Ann_ShowFormAnnouncement (void)
                            1 << Rol_TCH,
                            false,false);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** End table, send button and end box *****/
@@ -451,16 +452,19 @@ static void Ann_PutSubjectMessage (const char *Field,const char *Label,
    extern const char *The_ClassFormInBox[The_NUM_THEMES];
 
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">"
-	              "<label for=\"%s\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_TOP\"");
+   fprintf (Gbl.F.Out,"<label for=\"%s\" class=\"%s\">%s:</label>",
 	    Field,The_ClassFormInBox[Gbl.Prefs.Theme],Label);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">"
-                      "<textarea id=\"%s\" name=\"%s\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_TOP\"");
+   fprintf (Gbl.F.Out,"<textarea id=\"%s\" name=\"%s\""
                       " cols=\"75\" rows=\"%u\">"
                       "</textarea>",
 	    Field,Field,Rows);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
   }
 
diff --git a/swad_assignment.c b/swad_assignment.c
index 6e97589f..bc7596d1 100644
--- a/swad_assignment.c
+++ b/swad_assignment.c
@@ -358,12 +358,12 @@ static void Asg_ShowOneAssignment (long AsgCod,bool PrintView)
    /***** Write first row of data of this assignment *****/
    /* Forms to remove/edit this assignment */
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td rowspan=\"2\" class=\"CONTEXT_COL");
+
    if (PrintView)
-      fprintf (Gbl.F.Out,"\">");
+      Tbl_StartCellAttr ("rowspan=\"2\" class=\"CONTEXT_COL\"");
    else
      {
-      fprintf (Gbl.F.Out," COLOR%u\">",Gbl.RowEvenOdd);
+      Tbl_StartCellAttr ("rowspan=\"2\" class=\"CONTEXT_COL COLOR%u\"",Gbl.RowEvenOdd);
       Asg_PutFormsToRemEditOneAsg (&Asg,Anchor);
      }
    Tbl_EndCell ();
@@ -375,16 +375,22 @@ static void Asg_ShowOneAssignment (long AsgCod,bool PrintView)
 	StartEndTime <= (Dat_StartEndTime_t) (Dat_NUM_START_END_TIME - 1);
 	StartEndTime++)
      {
-      fprintf (Gbl.F.Out,"<td id=\"asg_date_%u_%u\" class=\"%s LEFT_BOTTOM",
-	       (unsigned) StartEndTime,UniqueId,
-	       Asg.Hidden ? (Asg.Open ? "DATE_GREEN_LIGHT" :
-					"DATE_RED_LIGHT") :
-			    (Asg.Open ? "DATE_GREEN" :
-					"DATE_RED"));
-      if (!PrintView)
-	 fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-      fprintf (Gbl.F.Out,"\">"
-			 "<script type=\"text/javascript\">"
+      if (PrintView)
+	 Tbl_StartCellAttr ("id=\"asg_date_%u_%u\" class=\"%s LEFT_BOTTOM\"",
+			    (unsigned) StartEndTime,UniqueId,
+			    Asg.Hidden ? (Asg.Open ? "DATE_GREEN_LIGHT" :
+						     "DATE_RED_LIGHT") :
+					 (Asg.Open ? "DATE_GREEN" :
+						     "DATE_RED"));
+      else
+	 Tbl_StartCellAttr ("id=\"asg_date_%u_%u\" class=\"%s LEFT_BOTTOM COLOR%u\"",
+			    (unsigned) StartEndTime,UniqueId,
+			    Asg.Hidden ? (Asg.Open ? "DATE_GREEN_LIGHT" :
+						     "DATE_RED_LIGHT") :
+					 (Asg.Open ? "DATE_GREEN" :
+						     "DATE_RED"),
+			    Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"<script type=\"text/javascript\">"
 			 "writeLocalDateHMSFromUTC('asg_date_%u_%u',%ld,"
 			 "%u,'<br />','%s',true,true,0x7);"
 			 "</script>",
@@ -394,37 +400,40 @@ static void Asg_ShowOneAssignment (long AsgCod,bool PrintView)
      }
 
    /* Assignment title */
-   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_TOP",
-	    Asg.Hidden ? "ASG_TITLE_LIGHT" :
-        	         "ASG_TITLE");
-   if (!PrintView)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
+   if (PrintView)
+      Tbl_StartCellAttr ("class=\"%s LEFT_TOP\"",
+			 Asg.Hidden ? "ASG_TITLE_LIGHT" :
+				      "ASG_TITLE");
+   else
+      Tbl_StartCellAttr ("class=\"%s LEFT_TOP COLOR%u\"",
+			 Asg.Hidden ? "ASG_TITLE_LIGHT" :
+				      "ASG_TITLE",
+			 Gbl.RowEvenOdd);
    Lay_StartArticle (Anchor);
    fprintf (Gbl.F.Out,"%s",Asg.Title);
    Lay_EndArticle ();
    Tbl_EndCell ();
 
    /* Assignment folder */
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP");
+   Tbl_StartCellAttr ("class=\"DAT LEFT_TOP");
    if (!PrintView)
       fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
    fprintf (Gbl.F.Out,"\">");
    if (Asg.SendWork == Asg_SEND_WORK)
       Asg_WriteAssignmentFolder (&Asg,PrintView);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Write second row of data of this assignment *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP");
-   if (!PrintView)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
 
    /* Author of the assignment */
+   if (PrintView)
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP\"");
+   else
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
    Asg_WriteAsgAuthor (&Asg);
-
    Tbl_EndCell ();
 
    /* Text of the assignment */
@@ -432,19 +441,18 @@ static void Asg_ShowOneAssignment (long AsgCod,bool PrintView)
    Str_ChangeFormat (Str_FROM_HTML,Str_TO_RIGOROUS_HTML,
                      Txt,Cns_MAX_BYTES_TEXT,false);	// Convert from HTML to recpectful HTML
    Str_InsertLinks (Txt,Cns_MAX_BYTES_TEXT,60);	// Insert links
-   fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP");
-   if (!PrintView)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
-
+   if (PrintView)
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP\"");
+   else
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
    if (Gbl.Crs.Grps.NumGrps)
       Asg_GetAndWriteNamesOfGrpsAssociatedToAsg (&Asg);
-
    fprintf (Gbl.F.Out,"<div class=\"PAR %s\">%s</div>",
             Asg.Hidden ? "DAT_LIGHT" :
         	         "DAT",
             Txt);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Free anchor string *****/
@@ -1159,16 +1167,19 @@ void Asg_RequestCreatOrEditAsg (void)
 
    /***** Assignment title *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-	              "<label for=\"Title\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"Title\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Title);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" id=\"Title\" name=\"Title\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" id=\"Title\" name=\"Title\""
                       " size=\"45\" maxlength=\"%u\" value=\"%s\""
                       " required=\"required\" />",
             Asg_MAX_CHARS_ASSIGNMENT_TITLE,Asg.Title);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Assignment start and end dates *****/
@@ -1176,34 +1187,38 @@ void Asg_RequestCreatOrEditAsg (void)
 
    /***** Send work? *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE\">"
-	              "%s:",
-            The_ClassFormInBox[Gbl.Prefs.Theme],
-            Txt_Upload_files_QUESTION);
+
+   Tbl_StartCellAttr ("class=\"%s RIGHT_MIDDLE\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
+   fprintf (Gbl.F.Out,"%s:",Txt_Upload_files_QUESTION);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-	              "<label class=\"DAT\">%s:"
+
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label class=\"DAT\">%s:"
                       "<input type=\"text\" name=\"Folder\""
                       " size=\"30\" maxlength=\"%u\" value=\"%s\" />"
                       "</label>",
             Txt_Folder,
             Brw_MAX_CHARS_FOLDER,Asg.Folder);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Assignment text *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">"
-	              "<label for=\"Txt\" class=\"%s\">%s:</label>",
+
+   Tbl_StartCellAttr ("class=\"RIGHT_TOP\"");
+   fprintf (Gbl.F.Out,"<label for=\"Txt\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Description);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">"
-                      "<textarea id=\"Txt\" name=\"Txt\""
+
+   Tbl_StartCellAttr ("class=\"LEFT_TOP\"");
+   fprintf (Gbl.F.Out,"<textarea id=\"Txt\" name=\"Txt\""
                       " cols=\"60\" rows=\"10\">");
    if (!ItsANewAssignment)
       fprintf (Gbl.F.Out,"%s",Txt);
    fprintf (Gbl.F.Out,"</textarea>");
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Groups *****/
@@ -1241,19 +1256,20 @@ static void Asg_ShowLstGrpsToEditAssignment (long AsgCod)
      {
       /***** Start box and table *****/
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP\">"
-	                 "%s:",
-               The_ClassFormInBox[Gbl.Prefs.Theme],
-               Txt_Groups);
+
+      Tbl_StartCellAttr ("class=\"%s RIGHT_TOP\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
+      fprintf (Gbl.F.Out,"%s:",Txt_Groups);
       Tbl_EndCell ();
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">");
+
+      Tbl_StartCellAttr ("class=\"LEFT_TOP\"");
       Box_StartBoxTable ("100%",NULL,NULL,
                          Hlp_USERS_Groups,Box_NOT_CLOSABLE,0);
 
       /***** First row: checkbox to select the whole course *****/
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td colspan=\"7\" class=\"DAT LEFT_MIDDLE\">"
-                         "<label>"
+
+      Tbl_StartCellAttr ("colspan=\"7\" class=\"DAT LEFT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"<label>"
                          "<input type=\"checkbox\" id=\"WholeCrs\" name=\"WholeCrs\" value=\"Y\"");
       if (!Asg_CheckIfAsgIsAssociatedToGrps (AsgCod))
          fprintf (Gbl.F.Out," checked=\"checked\"");
@@ -1262,6 +1278,7 @@ static void Asg_ShowLstGrpsToEditAssignment (long AsgCod)
                          "</label>",
                Txt_The_whole_course,Gbl.Hierarchy.Crs.ShrtName);
       Tbl_EndCell ();
+
       Tbl_EndRow ();
 
       /***** List the groups for each group type *****/
@@ -1275,6 +1292,7 @@ static void Asg_ShowLstGrpsToEditAssignment (long AsgCod)
       /***** End table and box *****/
       Box_EndBoxTable ();
       Tbl_EndCell ();
+
       Tbl_EndRow ();
      }
 
diff --git a/swad_attendance.c b/swad_attendance.c
index fa54185b..f4ae8051 100644
--- a/swad_attendance.c
+++ b/swad_attendance.c
@@ -388,10 +388,11 @@ static void Att_ShowOneAttEvent (struct AttendanceEvent *Att,bool ShowOnlyThisAt
    /***** Write first row of data of this attendance event *****/
    /* Forms to remove/edit this attendance event */
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td rowspan=\"2\" class=\"CONTEXT_COL");
-   if (!ShowOnlyThisAttEventComplete)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
+
+   if (ShowOnlyThisAttEventComplete)
+      Tbl_StartCellAttr ("rowspan=\"2\" class=\"CONTEXT_COL\"");
+   else
+      Tbl_StartCellAttr ("rowspan=\"2\" class=\"CONTEXT_COL COLOR%u\"",Gbl.RowEvenOdd);
    switch (Gbl.Usrs.Me.Role.Logged)
      {
       case Rol_TCH:
@@ -417,8 +418,8 @@ static void Att_ShowOneAttEvent (struct AttendanceEvent *Att,bool ShowOnlyThisAt
 					  "DATE_RED"));
       if (!ShowOnlyThisAttEventComplete)
 	 fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-      fprintf (Gbl.F.Out,"\">"
-			 "<script type=\"text/javascript\">"
+      fprintf (Gbl.F.Out,"\">");
+      fprintf (Gbl.F.Out,"<script type=\"text/javascript\">"
 			 "writeLocalDateHMSFromUTC('att_date_%u_%u',%ld,"
 			 "%u,'<br />','%s',true,true,0x7);"
 			 "</script>",
@@ -454,6 +455,7 @@ static void Att_ShowOneAttEvent (struct AttendanceEvent *Att,bool ShowOnlyThisAt
 
    /***** Write second row of data of this attendance event *****/
    Tbl_StartRow ();
+
    fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP");
    if (!ShowOnlyThisAttEventComplete)
       fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
@@ -469,6 +471,7 @@ static void Att_ShowOneAttEvent (struct AttendanceEvent *Att,bool ShowOnlyThisAt
    Str_ChangeFormat (Str_FROM_HTML,Str_TO_RIGOROUS_HTML,
                      Description,Cns_MAX_BYTES_TEXT,false);	// Convert from HTML to recpectful HTML
    Str_InsertLinks (Description,Cns_MAX_BYTES_TEXT,60);	// Insert links
+
    fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP");
    if (!ShowOnlyThisAttEventComplete)
       fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
@@ -483,6 +486,7 @@ static void Att_ShowOneAttEvent (struct AttendanceEvent *Att,bool ShowOnlyThisAt
             Description);
 
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Free anchor string *****/
@@ -1096,16 +1100,19 @@ void Att_RequestCreatOrEditAttEvent (void)
 
    /***** Attendance event title *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">"
-	              "<label for=\"Title\" class=\"%s\">%s:</label>",
+
+   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">");
+   fprintf (Gbl.F.Out,"<label for=\"Title\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Title);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">"
-                      "<input type=\"text\" id=\"Title\" name=\"Title\""
+
+   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">");
+   fprintf (Gbl.F.Out,"<input type=\"text\" id=\"Title\" name=\"Title\""
                       " size=\"45\" maxlength=\"%u\" value=\"%s\""
                       " required=\"required\" />",
             Att_MAX_CHARS_ATTENDANCE_EVENT_TITLE,Att.Title);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Assignment start and end dates *****/
@@ -1113,13 +1120,14 @@ void Att_RequestCreatOrEditAttEvent (void)
 
    /***** Visibility of comments *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">"
-	              "<label for=\"ComTchVisible\" class=\"%s\">%s:</label>",
+
+   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">");
+   fprintf (Gbl.F.Out,"<label for=\"ComTchVisible\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Teachers_comment);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">"
-                      "<select id=\"ComTchVisible\" name=\"ComTchVisible\">");
+   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">");
+   fprintf (Gbl.F.Out,"<select id=\"ComTchVisible\" name=\"ComTchVisible\">");
 
    fprintf (Gbl.F.Out,"<option value=\"N\"");
    if (!Att.CommentTchVisible)
@@ -1139,17 +1147,20 @@ void Att_RequestCreatOrEditAttEvent (void)
 
    /***** Attendance event description *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">"
-	              "<label for=\"Txt\" class=\"%s\">%s:</label>",
+
+   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP\">");
+   fprintf (Gbl.F.Out,"<label for=\"Txt\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Description);
    Tbl_EndCell ();
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">"
-                      "<textarea id=\"Txt\" name=\"Txt\""
+
+   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">");
+   fprintf (Gbl.F.Out,"<textarea id=\"Txt\" name=\"Txt\""
                       " cols=\"60\" rows=\"5\">");
    if (!ItsANewAttEvent)
       fprintf (Gbl.F.Out,"%s",Description);
    fprintf (Gbl.F.Out,"</textarea>");
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    /***** Groups *****/
@@ -1187,18 +1198,21 @@ static void Att_ShowLstGrpsToEditAttEvent (long AttCod)
      {
       /***** Start box and table *****/
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP\">"
-	                 "%s:",
-               The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Groups);
+
+      fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP\">",
+	       The_ClassFormInBox[Gbl.Prefs.Theme]);
+      fprintf (Gbl.F.Out,"%s:",Txt_Groups);
       Tbl_EndCell ();
+
       fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">");
       Box_StartBoxTable ("100%",NULL,NULL,
                          NULL,Box_NOT_CLOSABLE,0);
 
       /***** First row: checkbox to select the whole course *****/
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td colspan=\"7\" class=\"DAT LEFT_MIDDLE\">"
-                         "<label>"
+
+      fprintf (Gbl.F.Out,"<td colspan=\"7\" class=\"DAT LEFT_MIDDLE\">");
+      fprintf (Gbl.F.Out,"<label>"
                          "<input type=\"checkbox\" id=\"WholeCrs\" name=\"WholeCrs\" value=\"Y\"");
       if (!Att_CheckIfAttEventIsAssociatedToGrps (AttCod))
          fprintf (Gbl.F.Out," checked=\"checked\"");
@@ -1207,6 +1221,7 @@ static void Att_ShowLstGrpsToEditAttEvent (long AttCod)
                          "</label>",
                Txt_The_whole_course,Gbl.Hierarchy.Crs.ShrtName);
       Tbl_EndCell ();
+
       Tbl_EndRow ();
 
       /***** List the groups for each group type *****/
@@ -2082,18 +2097,21 @@ static void Att_WriteRowUsrToCallTheRoll (unsigned NumUsr,
 
    /***** Icon to show if the user is already present *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"BT%u\">"
-                      "<label for=\"Std%u\">",
-            Gbl.RowEvenOdd,NumUsr);
+
+   fprintf (Gbl.F.Out,"<td class=\"BT%u\">",
+	    Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"<label for=\"Std%u\">",
+            NumUsr);
    Att_PutCheckOrCross (Present);
    fprintf (Gbl.F.Out,"</label>");
    Tbl_EndCell ();
 
    /***** Checkbox to select user *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_TOP COLOR%u\">"
-	              "<input type=\"checkbox\" id=\"Std%u\" name=\"UsrCodStd\""
+   fprintf (Gbl.F.Out,"<td class=\"CENTER_TOP COLOR%u\">",
+	    Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"<input type=\"checkbox\" id=\"Std%u\" name=\"UsrCodStd\""
 	              " value=\"%s\"",
-	    Gbl.RowEvenOdd,NumUsr,
+	    NumUsr,
 	    UsrDat->EncryptedUsrCod);
    if (Present)	// This student has attended to the event?
       fprintf (Gbl.F.Out," checked=\"checked\"");
@@ -2103,12 +2121,11 @@ static void Att_WriteRowUsrToCallTheRoll (unsigned NumUsr,
    Tbl_EndCell ();
 
    /***** Write number of student in the list *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP COLOR%u\">"
-	              "%u",
+   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP COLOR%u\">",
             UsrDat->Accepted ? "DAT_N" :
         	               "DAT",
-            Gbl.RowEvenOdd,
-            NumUsr);
+            Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%u",NumUsr);
    Tbl_EndCell ();
 
    /***** Show student's photo *****/
@@ -2132,15 +2149,14 @@ static void Att_WriteRowUsrToCallTheRoll (unsigned NumUsr,
    Tbl_EndCell ();
 
    /***** Write student's name *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_TOP COLOR%u\">%s",
+   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_TOP COLOR%u\">",
 	    UsrDat->Accepted ? "DAT_SMALL_N" :
 		               "DAT_SMALL",
-	    Gbl.RowEvenOdd,
-	    UsrDat->Surname1);
+	    Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%s",UsrDat->Surname1);
    if (UsrDat->Surname2[0])
      fprintf (Gbl.F.Out," %s",UsrDat->Surname2);
-   fprintf (Gbl.F.Out,", %s",
-	    UsrDat->FirstName);
+   fprintf (Gbl.F.Out,", %s",UsrDat->FirstName);
    Tbl_EndCell ();
 
    /***** Student's comment: write form or text */
@@ -3129,44 +3145,48 @@ static void Att_ListEventsToSelect (Att_TypeOfView_t TypeOfView)
 
       /* Write a row for this event */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_TOP COLOR%u\">"
-			 "<input type=\"checkbox\""
+
+      fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_TOP COLOR%u\">",
+	       Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"<input type=\"checkbox\""
 			 " id=\"Att%u\" name=\"AttCods\" value=\"%ld\"",
-	       Gbl.RowEvenOdd,
 	       NumAttEvent,
 	       Gbl.AttEvents.Lst[NumAttEvent].AttCod);
       if (Gbl.AttEvents.Lst[NumAttEvent].Selected)
 	 fprintf (Gbl.F.Out," checked=\"checked\"");
       fprintf (Gbl.F.Out," />");
       Tbl_EndCell ();
-      fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_TOP COLOR%u\">"
-			 "<label for=\"Att%u\">%u:</label>",
-	       Gbl.RowEvenOdd,
+
+      fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_TOP COLOR%u\">",
+	       Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"<label for=\"Att%u\">%u:</label>",
 	       NumAttEvent,NumAttEvent + 1);
       Tbl_EndCell ();
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP COLOR%u\">"
-			 "<label for=\"Att%u\">"
+
+      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP COLOR%u\">",
+	       Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"<label for=\"Att%u\">"
                          "<span id=\"att_date_start_%u\"></span>"
                          "</label>"
 			 "<script type=\"text/javascript\">"
 			 "writeLocalDateHMSFromUTC('att_date_start_%u',%ld,"
 			 "%u,',&nbsp;','%s',true,true,0x7);"
 			 "</script>",
-	       Gbl.RowEvenOdd,
 	       NumAttEvent,UniqueId,
                UniqueId,Gbl.AttEvents.Lst[NumAttEvent].TimeUTC[Att_START_TIME],
                (unsigned) Gbl.Prefs.DateFormat,Txt_Today);
       Tbl_EndCell ();
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP COLOR%u\">"
-			 "%s",
-	       Gbl.RowEvenOdd,
-	       Gbl.AttEvents.Lst[NumAttEvent].Title);
+
+      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP COLOR%u\">",
+	       Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"%s",Gbl.AttEvents.Lst[NumAttEvent].Title);
       Tbl_EndCell ();
-      fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_TOP COLOR%u\">"
-			 "%u",
-	       Gbl.RowEvenOdd,
-	       Gbl.AttEvents.Lst[NumAttEvent].NumStdsTotal);
+
+      fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_TOP COLOR%u\">",
+	       Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"%u",Gbl.AttEvents.Lst[NumAttEvent].NumStdsTotal);
       Tbl_EndCell ();
+
       Tbl_EndRow ();
      }
 
@@ -3174,12 +3194,14 @@ static void Att_ListEventsToSelect (Att_TypeOfView_t TypeOfView)
    if (NormalView)
      {
       Tbl_StartRow ();
+
       fprintf (Gbl.F.Out,"<td colspan=\"5\" class=\"CENTER_MIDDLE\">");
       Frm_LinkFormSubmitAnimated (Txt_Update_attendance,
 	                          The_ClassFormInBoxBold[Gbl.Prefs.Theme],
 				  NULL);
       Ico_PutCalculateIconWithText (Txt_Update_attendance);
       Tbl_EndCell ();
+
       Tbl_EndRow ();
      }
 
@@ -3258,27 +3280,30 @@ static void Att_ListUsrsAttendanceTable (Att_TypeOfView_t TypeOfView,
    if (NumUsrsInList > 1)
      {
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td colspan=\"%u\" class=\"DAT_N_LINE_TOP RIGHT_MIDDLE\">"
-			 "%s:",
+
+      fprintf (Gbl.F.Out,"<td colspan=\"%u\" class=\"DAT_N_LINE_TOP RIGHT_MIDDLE\">",
 	       Gbl.Usrs.Listing.WithPhotos ? 4 :
-					     3,
-	       Txt_Number_of_users);
+					     3);
+      fprintf (Gbl.F.Out,"%s:",Txt_Number_of_users);
       Tbl_EndCell ();
+
       for (NumAttEvent = 0, Total = 0;
 	   NumAttEvent < Gbl.AttEvents.Num;
 	   NumAttEvent++)
 	 if (Gbl.AttEvents.Lst[NumAttEvent].Selected)
 	   {
-	    fprintf (Gbl.F.Out,"<td class=\"DAT_N_LINE_TOP RIGHT_MIDDLE\">"
-			       "%u",
+	    fprintf (Gbl.F.Out,"<td class=\"DAT_N_LINE_TOP RIGHT_MIDDLE\">");
+	    fprintf (Gbl.F.Out,"%u",
 		     Gbl.AttEvents.Lst[NumAttEvent].NumStdsFromList);
 	    Tbl_EndCell ();
+
 	    Total += Gbl.AttEvents.Lst[NumAttEvent].NumStdsFromList;
 	   }
-      fprintf (Gbl.F.Out,"<td class=\"DAT_N_LINE_TOP RIGHT_MIDDLE\">"
-			 "%u",
-	       Total);
+
+      fprintf (Gbl.F.Out,"<td class=\"DAT_N_LINE_TOP RIGHT_MIDDLE\">");
+      fprintf (Gbl.F.Out,"%u",Total);
       Tbl_EndCell ();
+
       Tbl_EndRow ();
      }
 
@@ -3357,12 +3382,12 @@ static void Att_WriteRowUsrSeveralAttEvents (unsigned NumUsr,struct UsrData *Usr
 
    /***** Write number of user in the list *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE COLOR%u\">"
-	              "%u",
+
+   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE COLOR%u\">",
             UsrDat->Accepted ? "DAT_N" :
         	               "DAT",
-            Gbl.RowEvenOdd,
-            NumUsr + 1);
+            Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%u",NumUsr + 1);
    Tbl_EndCell ();
 
    /***** Show user's photo *****/
@@ -3387,12 +3412,11 @@ static void Att_WriteRowUsrSeveralAttEvents (unsigned NumUsr,struct UsrData *Usr
    Tbl_EndCell ();
 
    /***** Write user's name *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_MIDDLE COLOR%u\">"
-	              "%s",
+   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_MIDDLE COLOR%u\">",
 	    UsrDat->Accepted ? "DAT_SMALL_N" :
 		               "DAT_SMALL",
-	    Gbl.RowEvenOdd,
-	    UsrDat->Surname1);
+	    Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%s",UsrDat->Surname1);
    if (UsrDat->Surname2[0])
      fprintf (Gbl.F.Out," %s",UsrDat->Surname2);
    fprintf (Gbl.F.Out,", %s",
@@ -3411,8 +3435,7 @@ static void Att_WriteRowUsrSeveralAttEvents (unsigned NumUsr,struct UsrData *Usr
 	                                              UsrDat->UsrCod);
 
 	 /* Write check or cross */
-	 fprintf (Gbl.F.Out,"<td class=\"BM%u\">",
-		  Gbl.RowEvenOdd);
+	 fprintf (Gbl.F.Out,"<td class=\"BM%u\">",Gbl.RowEvenOdd);
 	 Att_PutCheckOrCross (Present);
 	 Tbl_EndCell ();
 
@@ -3421,11 +3444,11 @@ static void Att_WriteRowUsrSeveralAttEvents (unsigned NumUsr,struct UsrData *Usr
 	}
 
    /***** Last column with the number of times this user is present *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT_N RIGHT_MIDDLE COLOR%u\">"
-	              "%u",
-	    Gbl.RowEvenOdd,
-	    NumTimesPresent);
+   fprintf (Gbl.F.Out,"<td class=\"DAT_N RIGHT_MIDDLE COLOR%u\">",
+	    Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%u",NumTimesPresent);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    Gbl.RowEvenOdd = 1 - Gbl.RowEvenOdd;
@@ -3521,12 +3544,12 @@ static void Att_ListAttEventsForAStd (unsigned NumUsr,struct UsrData *UsrDat)
    /***** Write number of student in the list *****/
    NumUsr++;
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE COLOR%u\">"
-	              "%u:",
+
+   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE COLOR%u\">",
 	    UsrDat->Accepted ? "DAT_N" :
 			       "DAT",
-	    Gbl.RowEvenOdd,
-	    NumUsr);
+	    Gbl.RowEvenOdd);
+   fprintf (Gbl.F.Out,"%u:",NumUsr);
    Tbl_EndCell ();
 
    /***** Show student's photo *****/
@@ -3543,6 +3566,7 @@ static void Att_ListAttEventsForAStd (unsigned NumUsr,struct UsrData *UsrDat)
             Gbl.RowEvenOdd);
    Tbl_StartTable ();
    Tbl_StartRow ();
+
    fprintf (Gbl.F.Out,"<td class=\"%s LEFT_MIDDLE\">",
 	    UsrDat->Accepted ? "DAT_N" :
 			       "DAT");
@@ -3550,15 +3574,15 @@ static void Att_ListAttEventsForAStd (unsigned NumUsr,struct UsrData *UsrDat)
    Tbl_EndCell ();
 
    /***** Write student's name *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_MIDDLE\">%s",
+   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_MIDDLE\">",
 	    UsrDat->Accepted ? "DAT_SMALL_N" :
-			       "DAT_SMALL",
-	    UsrDat->Surname1);
+			       "DAT_SMALL");
+   fprintf (Gbl.F.Out,"%s",UsrDat->Surname1);
    if (UsrDat->Surname2[0])
-     fprintf (Gbl.F.Out," %s",UsrDat->Surname2);
-   fprintf (Gbl.F.Out,", %s",
-	    UsrDat->FirstName);
+      fprintf (Gbl.F.Out," %s",UsrDat->Surname2);
+   fprintf (Gbl.F.Out,", %s",UsrDat->FirstName);
    Tbl_EndCell ();
+
    Tbl_EndRow ();
    Tbl_EndTable ();
    Tbl_EndCell ();
@@ -3586,12 +3610,11 @@ static void Att_ListAttEventsForAStd (unsigned NumUsr,struct UsrData *UsrDat)
 
 	 Tbl_PutEmptyColouredCells (1);
 
-	 fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP COLOR%u\">"
-			    "%u:",
+	 fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_TOP COLOR%u\">",
 		  Present ? "DAT_GREEN" :
 			    "DAT_RED",
-	          Gbl.RowEvenOdd,
-		  NumAttEvent + 1);
+	          Gbl.RowEvenOdd);
+	 fprintf (Gbl.F.Out,"%u:",NumAttEvent + 1);
 	 Tbl_EndCell ();
 
 	 fprintf (Gbl.F.Out,"<td class=\"BT%u\">",
@@ -3599,14 +3622,14 @@ static void Att_ListAttEventsForAStd (unsigned NumUsr,struct UsrData *UsrDat)
          Att_PutCheckOrCross (Present);
 	 Tbl_EndCell ();
 
-	 fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP COLOR%u\">"
-	                    "<span id=\"att_date_start_%u_%u\"></span>"
+	 fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP COLOR%u\">",
+	          Gbl.RowEvenOdd);
+	 fprintf (Gbl.F.Out,"<span id=\"att_date_start_%u_%u\"></span>"
 	                    "<br />%s"
 			    "<script type=\"text/javascript\">"
 			    "writeLocalDateHMSFromUTC('att_date_start_%u_%u',%ld,"
 			    "%u,',&nbsp;','%s',true,true,0x7);"
 			    "</script>",
-	          Gbl.RowEvenOdd,
 	          NumUsr,UniqueId,
 	          Gbl.AttEvents.Lst[NumAttEvent].Title,
                   NumUsr,UniqueId,
@@ -3627,9 +3650,9 @@ static void Att_ListAttEventsForAStd (unsigned NumUsr,struct UsrData *UsrDat)
 	             Gbl.RowEvenOdd);
 	    Tbl_EndCell ();
 
-	    fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE COLOR%u\">"
-	                       "<dl>",
+	    fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE COLOR%u\">",
 	             Gbl.RowEvenOdd);
+	    fprintf (Gbl.F.Out,"<dl>");
 	    if (ShowCommentStd)
 	      {
 	       Str_ChangeFormat (Str_FROM_HTML,Str_TO_RIGOROUS_HTML,
diff --git a/swad_changelog.h b/swad_changelog.h
index 060734ea..c7ed5826 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -487,7 +487,7 @@ enscript -2 --landscape --color --file-align=2 --highlight --line-numbers -o - *
 En OpenSWAD:
 ps2pdf source.ps destination.pdf
 */
-#define Log_PLATFORM_VERSION	"SWAD 19.31.17 (2019-10-07)"
+#define Log_PLATFORM_VERSION	"SWAD 19.31.18 (2019-10-07)"
 #define CSS_FILE		"swad19.29.css"
 #define JS_FILE			"swad19.30.js"
 /*
@@ -495,6 +495,7 @@ ps2pdf source.ps destination.pdf
 // TODO: Un TFG preasignado sin estudiante tiene que salir un triángulo amarillo
 // TODO: Hacer un nuevo rol en los TFG: tutor externo (profesor de áreas no vinculadas con el centro, profesionales de empresas, etc.)
 
+	Version 19.31.18: Oct 07, 2019	Code refactoring in HTML tables. (247239 lines)
 	Version 19.31.17: Oct 07, 2019	Code refactoring in HTML tables. (247221 lines)
 	Version 19.31.16: Oct 07, 2019	Code refactoring in HTML tables. (247185 lines)
 	Version 19.31.15: Oct 07, 2019	Code refactoring in HTML tables. (247153 lines)
diff --git a/swad_table.c b/swad_table.c
index a5646e59..f2a16d72 100644
--- a/swad_table.c
+++ b/swad_table.c
@@ -213,6 +213,44 @@ void Tbl_EndRow (void)
 /********************************* Table cells *******************************/
 /*****************************************************************************/
 
+void Tbl_StartCellAttr (const char *fmt,...)
+  {
+   va_list ap;
+   int NumBytesPrinted;
+   char *Attr;
+
+   if (fmt)
+     {
+      if (fmt[0])
+	{
+	 va_start (ap,fmt);
+	 NumBytesPrinted = vasprintf (&Attr,fmt,ap);
+	 va_end (ap);
+
+	 if (NumBytesPrinted < 0)	// If memory allocation wasn't possible,
+					// or some other error occurs,
+					// vasprintf will return -1
+	    Lay_NotEnoughMemoryExit ();
+
+	 /***** Print HTML *****/
+	 fprintf (Gbl.F.Out,
+		  "<tr %s>",Attr);
+
+	 free ((void *) Attr);
+	}
+      else
+         Tbl_StartCell ();
+     }
+   else
+      Tbl_StartCell ();
+  }
+
+void Tbl_StartCell (void)
+  {
+   fprintf (Gbl.F.Out,
+	    "<td>");
+  }
+
 void Tbl_EndCell (void)
   {
    fprintf (Gbl.F.Out,
diff --git a/swad_table.h b/swad_table.h
index e0b77ab7..f04f53c0 100644
--- a/swad_table.h
+++ b/swad_table.h
@@ -54,6 +54,8 @@ void Tbl_StartRowAttr (const char *fmt,...);
 void Tbl_StartRow (void);
 void Tbl_EndRow (void);
 
+void Tbl_StartCellAttr (const char *fmt,...);
+void Tbl_StartCell (void);
 void Tbl_EndCell (void);
 void Tbl_PutEmptyCells (unsigned NumColumns);
 void Tbl_PutEmptyColouredCells (unsigned NumColumns);