diff --git a/swad_ID.c b/swad_ID.c
index fdcce443d..d1d6f1462 100644
--- a/swad_ID.c
+++ b/swad_ID.c
@@ -604,14 +604,15 @@ static void ID_ShowFormChangeUsrID (const struct UsrData *UsrDat,
       if (NumID == 0)
 	{
 	 Tbl_StartRow ();
-	 fprintf (Gbl.F.Out,"<td class=\"REC_C1_BOT RIGHT_TOP\">"
-			    "<label for=\"UsrID\" class=\"%s\">"
+
+	 Tbl_StartCellAttr ("class=\"REC_C1_BOT RIGHT_TOP\"");
+	 fprintf (Gbl.F.Out,"<label for=\"UsrID\" class=\"%s\">"
 			    "%s:"
 			    "</label>",
 		  The_ClassFormInBox[Gbl.Prefs.Theme],Txt_ID);
 	 Tbl_EndCell ();
 
-	 fprintf (Gbl.F.Out,"<td class=\"REC_C2_BOT LEFT_TOP USR_ID\">");
+	 Tbl_StartCellAttr ("class=\"REC_C2_BOT LEFT_TOP USR_ID\"");
 	}
       else	// NumID >= 1
          fprintf (Gbl.F.Out,"<br />");
@@ -676,7 +677,7 @@ static void ID_ShowFormChangeUsrID (const struct UsrData *UsrDat,
       /***** Write help text *****/
       Tbl_StartRow ();
 
-      fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"DAT CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"DAT CENTER_MIDDLE\"");
       Ale_ShowAlert (Ale_INFO,Txt_The_ID_is_used_in_order_to_facilitate_);
       Tbl_EndCell ();
 
@@ -685,14 +686,14 @@ static void ID_ShowFormChangeUsrID (const struct UsrData *UsrDat,
       /***** Form to enter new user's ID *****/
       Tbl_StartRow ();
 
-      fprintf (Gbl.F.Out,"<td class=\"REC_C1_BOT RIGHT_TOP\">"
-			 "<label for=\"NewID\" class=\"%s\">%s:</label>",
+      Tbl_StartCellAttr ("class=\"REC_C1_BOT RIGHT_TOP\"");
+      fprintf (Gbl.F.Out,"<label for=\"NewID\" class=\"%s\">%s:</label>",
 	       The_ClassFormInBox[Gbl.Prefs.Theme],
 	       UsrDat->IDs.Num ? Txt_Another_ID :	// A new user's ID
 		                 Txt_ID);		// The first user's ID
       Tbl_EndCell ();
 
-      fprintf (Gbl.F.Out,"<td class=\"REC_C2_BOT LEFT_TOP DAT\">");
+      Tbl_StartCellAttr ("class=\"REC_C2_BOT LEFT_TOP DAT\"");
       if (ItsMe)
 	 Frm_StartFormAnchor (ActChgMyID,ID_ID_SECTION_ID);
       else
diff --git a/swad_changelog.h b/swad_changelog.h
index 783d7dccb..f02106f18 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 19.31.24 (2019-10-08)"
+#define Log_PLATFORM_VERSION	"SWAD 19.31.25 (2019-10-08)"
 #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 19.31.25: Oct 08, 2019	Code refactoring in HTML tables. (246872 lines)
 	Version 19.31.24: Oct 08, 2019	Code refactoring in HTML tables. (246882 lines)
 	Version 19.31.23: Oct 08, 2019	Code refactoring in HTML tables. (247076 lines)
 	Version 19.31.22: Oct 08, 2019	Code refactoring in HTML tables. (247099 lines)
diff --git a/swad_game.c b/swad_game.c
index 183d9c79f..c6d2d7e02 100644
--- a/swad_game.c
+++ b/swad_game.c
@@ -402,10 +402,10 @@ void Gam_ShowOneGame (long GamCod,
    /***** Icons related to this game *****/
    if (Gam_CheckIfICanEditGames ())
      {
-      fprintf (Gbl.F.Out,"<td rowspan=\"2\" class=\"CONTEXT_COL");
-      if (!ShowOnlyThisGame)
-	 fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-      fprintf (Gbl.F.Out,"\">");
+      if (ShowOnlyThisGame)
+	 Tbl_StartCellAttr ("rowspan=\"2\" class=\"CONTEXT_COL\"");
+      else
+	 Tbl_StartCellAttr ("rowspan=\"2\" class=\"CONTEXT_COL COLOR%u\"",Gbl.RowEvenOdd);
 
       /* Icons to remove/edit this game */
       Gam_PutFormsToRemEditOneGame (&Game,Anchor);
@@ -419,13 +419,17 @@ void Gam_ShowOneGame (long GamCod,
 	StartEndTime <= (Dat_StartEndTime_t) (Dat_NUM_START_END_TIME - 1);
 	StartEndTime++)
      {
-      fprintf (Gbl.F.Out,"<td id=\"gam_date_%u_%u\" class=\"%s LEFT_TOP",
-	       (unsigned) StartEndTime,UniqueId,
-	       Game.Hidden ? "DATE_GREEN_LIGHT":
-		             "DATE_GREEN");
-      if (!ShowOnlyThisGame)
-	 fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-      fprintf (Gbl.F.Out,"\">");
+      if (ShowOnlyThisGame)
+	 Tbl_StartCellAttr ("id=\"gam_date_%u_%u\" class=\"%s LEFT_TOP\"",
+		  (unsigned) StartEndTime,UniqueId,
+		  Game.Hidden ? "DATE_GREEN_LIGHT":
+				"DATE_GREEN");
+      else
+	 Tbl_StartCellAttr ("id=\"gam_date_%u_%u\" class=\"%s LEFT_TOP COLOR%u\"",
+		  (unsigned) StartEndTime,UniqueId,
+		  Game.Hidden ? "DATE_GREEN_LIGHT":
+				"DATE_GREEN",
+		  Gbl.RowEvenOdd);
       if (Game.TimeUTC[Dat_START_TIME])
 	 fprintf (Gbl.F.Out,"<script type=\"text/javascript\">"
 			    "writeLocalDateHMSFromUTC('gam_date_%u_%u',%ld,"
@@ -438,10 +442,10 @@ void Gam_ShowOneGame (long GamCod,
      }
 
    /***** Game title and main data *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP");
-   if (!ShowOnlyThisGame)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
+   if (ShowOnlyThisGame)
+      Tbl_StartCellAttr ("class=\"LEFT_TOP\"");
+   else
+      Tbl_StartCellAttr ("class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
 
    /* Game title */
    Gam_SetParamCurrentGamCod (GamCod);	// Used to pass parameter
@@ -466,10 +470,10 @@ void Gam_ShowOneGame (long GamCod,
    Tbl_EndCell ();
 
    /***** Number of matches in game *****/
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP");
-   if (!ShowOnlyThisGame)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
+   if (ShowOnlyThisGame)
+      Tbl_StartCellAttr ("class=\"RIGHT_TOP\"");
+   else
+      Tbl_StartCellAttr ("class=\"RIGHT_TOP COLOR%u\"",Gbl.RowEvenOdd);
 
    Gam_SetParamCurrentGamCod (GamCod);	// Used to pass parameter
    Frm_StartForm (ActSeeGam);
@@ -491,18 +495,18 @@ void Gam_ShowOneGame (long GamCod,
    Tbl_StartRow ();
 
    /***** Author of the game *****/
-   fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP");
-   if (!ShowOnlyThisGame)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
+   if (ShowOnlyThisGame)
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP\"");
+   else
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
    Gam_WriteAuthor (&Game);
    Tbl_EndCell ();
 
    /***** Text of the game *****/
-   fprintf (Gbl.F.Out,"<td colspan=\"2\" class=\"LEFT_TOP");
-   if (!ShowOnlyThisGame)
-      fprintf (Gbl.F.Out," COLOR%u",Gbl.RowEvenOdd);
-   fprintf (Gbl.F.Out,"\">");
+   if (ShowOnlyThisGame)
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP\"");
+   else
+      Tbl_StartCellAttr ("colspan=\"2\" class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
    Gam_GetGameTxtFromDB (Game.GamCod,Txt);
    Str_ChangeFormat (Str_FROM_HTML,Str_TO_RIGOROUS_HTML,
                      Txt,Cns_MAX_BYTES_TEXT,false);	// Convert from HTML to rigorous HTML
@@ -1137,14 +1141,14 @@ static void Gam_PutFormsEditionGame (struct Game *Game,bool ItsANewGame)
    /***** Game 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\" />",
 	    Gam_MAX_CHARS_TITLE,Game->Title);
@@ -1155,14 +1159,14 @@ static void Gam_PutFormsEditionGame (struct Game *Game,bool ItsANewGame)
    /***** Game 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 (!ItsANewGame)
       fprintf (Gbl.F.Out,"%s",Txt);
@@ -1692,7 +1696,8 @@ static void Gam_ListOneOrMoreQuestionsForEdition (long GamCod,unsigned NumQsts,
       Gam_SetParamCurrentGamCod (GamCod);	// Used to pass parameter
       Gam_CurrentQstInd = QstInd;
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"BT%u\">",Gbl.RowEvenOdd);
+
+      Tbl_StartCellAttr ("class=\"BT%u\"",Gbl.RowEvenOdd);
 
       /* Put icon to remove the question */
       if (ICanEditQuestions)
@@ -1739,10 +1744,8 @@ static void Gam_ListOneOrMoreQuestionsForEdition (long GamCod,unsigned NumQsts,
       Tbl_EndCell ();
 
       /* Write number of question */
-      fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP COLOR%u\">"
-			 "<div class=\"BIG_INDEX\">%s</div>",
-	       Gbl.RowEvenOdd,
-	       StrQstInd);
+      Tbl_StartCellAttr ("class=\"RIGHT_TOP COLOR%u\"",Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"<div class=\"BIG_INDEX\">%s</div>",StrQstInd);
 
       /* Write answer type (row[2]) */
       Gbl.Test.AnswerType = Tst_ConvertFromStrAnsTypDBToAnsTyp (row[2]);
@@ -1751,20 +1754,17 @@ static void Gam_ListOneOrMoreQuestionsForEdition (long GamCod,unsigned NumQsts,
       Tbl_EndCell ();
 
       /* Write question code */
-      fprintf (Gbl.F.Out,"<td class=\"DAT_SMALL CENTER_TOP COLOR%u\">"
-	                 "%ld&nbsp;",
-               Gbl.RowEvenOdd,Gbl.Test.QstCod);
+      Tbl_StartCellAttr ("class=\"DAT_SMALL CENTER_TOP COLOR%u\"",Gbl.RowEvenOdd);
+      fprintf (Gbl.F.Out,"%ld&nbsp;",Gbl.Test.QstCod);
       Tbl_EndCell ();
 
       /* Write the question tags */
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP COLOR%u\">",
-               Gbl.RowEvenOdd);
+      Tbl_StartCellAttr ("class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
       Tst_GetAndWriteTagsQst (Gbl.Test.QstCod);
       Tbl_EndCell ();
 
       /* Write stem (row[3]) */
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP COLOR%u\">",
-	       Gbl.RowEvenOdd);
+      Tbl_StartCellAttr ("class=\"LEFT_TOP COLOR%u\"",Gbl.RowEvenOdd);
       Tst_WriteQstStem (row[3],"TEST_EDI");
 
       /* Get media (row[5]) */
diff --git a/swad_group.c b/swad_group.c
index c3c93f199..fcdbffa26 100644
--- a/swad_group.c
+++ b/swad_group.c
@@ -1293,9 +1293,10 @@ static void Grp_ListGroupTypesForEdition (void)
 	NumGrpTyp < Gbl.Crs.Grps.GrpTypes.Num;
 	NumGrpTyp++, UniqueId++)
      {
-      /* Put icon to remove group type */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"BM\">");
+
+      /* Put icon to remove group type */
+      Tbl_StartCellAttr ("class=\"BM\"");
       Frm_StartFormAnchor (ActReqRemGrpTyp,Grp_GROUP_TYPES_SECTION_ID);
       Grp_PutParamGrpTypCod (Gbl.Crs.Grps.GrpTypes.LstGrpTypes[NumGrpTyp].GrpTypCod);
       Ico_PutIconRemove ();
@@ -1303,7 +1304,7 @@ static void Grp_ListGroupTypesForEdition (void)
       Tbl_EndCell ();
 
       /* Name of group type */
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
       Frm_StartFormAnchor (ActRenGrpTyp,Grp_GROUP_TYPES_SECTION_ID);
       Grp_PutParamGrpTypCod (Gbl.Crs.Grps.GrpTypes.LstGrpTypes[NumGrpTyp].GrpTypCod);
       fprintf (Gbl.F.Out,"<input type=\"text\" name=\"GrpTypName\""
@@ -1316,7 +1317,7 @@ static void Grp_ListGroupTypesForEdition (void)
       Tbl_EndCell ();
 
       /* Is it mandatory to register in any group? */
-      fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
       Frm_StartFormAnchor (ActChgMdtGrpTyp,Grp_GROUP_TYPES_SECTION_ID);
       Grp_PutParamGrpTypCod (Gbl.Crs.Grps.GrpTypes.LstGrpTypes[NumGrpTyp].GrpTypCod);
       fprintf (Gbl.F.Out,"<select name=\"MandatoryEnrolment\""
@@ -1338,7 +1339,7 @@ static void Grp_ListGroupTypesForEdition (void)
       Tbl_EndCell ();
 
       /* Is it possible to register in multiple groups? */
-      fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
       Frm_StartFormAnchor (ActChgMulGrpTyp,Grp_GROUP_TYPES_SECTION_ID);
       Grp_PutParamGrpTypCod (Gbl.Crs.Grps.GrpTypes.LstGrpTypes[NumGrpTyp].GrpTypCod);
       fprintf (Gbl.F.Out,"<select name=\"MultipleEnrolment\""
@@ -1360,14 +1361,14 @@ static void Grp_ListGroupTypesForEdition (void)
       Tbl_EndCell ();
 
       /* Open time */
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
       Frm_StartFormAnchor (ActChgTimGrpTyp,Grp_GROUP_TYPES_SECTION_ID);
       Grp_PutParamGrpTypCod (Gbl.Crs.Grps.GrpTypes.LstGrpTypes[NumGrpTyp].GrpTypCod);
       Tbl_StartTableCenterPadding (2);
       Tbl_StartRow ();
 
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\" style=\"width:16px;\">"
-                         "<img src=\"%s/clock.svg\""
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\" style=\"width:16px;\"");
+      fprintf (Gbl.F.Out,"<img src=\"%s/clock.svg\""
                          " alt=\"%s\" title=\"%s\""
                          " class=\"%sCONTEXT_ICO_16x16\" />",
                Cfg_URL_ICON_PUBLIC,
@@ -1379,7 +1380,7 @@ static void Grp_ListGroupTypesForEdition (void)
         	                                                           "ICO_HIDDEN ");
       Tbl_EndCell ();
 
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
       snprintf (Id,sizeof (Id),
 	        "open_time_%u",
 		UniqueId);
@@ -1399,9 +1400,8 @@ static void Grp_ListGroupTypesForEdition (void)
       Tbl_EndCell ();
 
       /* Number of groups of this type */
-      fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE\">"
-	                 "%u",
-               Gbl.Crs.Grps.GrpTypes.LstGrpTypes[NumGrpTyp].NumGrps);
+      Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
+      fprintf (Gbl.F.Out,"%u",Gbl.Crs.Grps.GrpTypes.LstGrpTypes[NumGrpTyp].NumGrps);
       Tbl_EndCell ();
 
       Tbl_EndRow ();
@@ -1513,9 +1513,10 @@ static void Grp_ListGroupsForEdition (void)
         {
          Grp = &(GrpTyp->LstGrps[NumGrpThisType]);
 
-         /***** Icon to remove group *****/
          Tbl_StartRow ();
-         fprintf (Gbl.F.Out,"<td class=\"BM\">");
+
+         /***** Icon to remove group *****/
+         Tbl_StartCellAttr ("class=\"BM\"");
          Frm_StartFormAnchor (ActReqRemGrp,Grp_GROUPS_SECTION_ID);
          Grp_PutParamGrpCod (Grp->GrpCod);
          Ico_PutIconRemove ();
@@ -1523,7 +1524,7 @@ static void Grp_ListGroupsForEdition (void)
          Tbl_EndCell ();
 
          /***** Icon to open/close group *****/
-         fprintf (Gbl.F.Out,"<td class=\"BM\">");
+         Tbl_StartCellAttr ("class=\"BM\"");
          Frm_StartFormAnchor (Grp->Open ? ActCloGrp :
                                           ActOpeGrp,
                               Grp_GROUPS_SECTION_ID);
@@ -1539,7 +1540,7 @@ static void Grp_ListGroupsForEdition (void)
          Tbl_EndCell ();
 
          /***** Icon to activate file zones for this group *****/
-         fprintf (Gbl.F.Out,"<td class=\"BM\">");
+         Tbl_StartCellAttr ("class=\"BM\"");
          Frm_StartFormAnchor (Grp->FileZones ? ActDisFilZonGrp :
                                                ActEnaFilZonGrp,
                               Grp_GROUPS_SECTION_ID);
@@ -1556,7 +1557,7 @@ static void Grp_ListGroupsForEdition (void)
 
          /***** Group type *****/
          /* Start selector */
-         fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+         Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
          Frm_StartFormAnchor (ActChgGrpTyp,Grp_GROUPS_SECTION_ID);
          Grp_PutParamGrpCod (Grp->GrpCod);
          fprintf (Gbl.F.Out,"<select name=\"GrpTypCod\" style=\"width:100px;\""
@@ -1581,7 +1582,7 @@ static void Grp_ListGroupsForEdition (void)
          Tbl_EndCell ();
 
          /***** Group name *****/
-         fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+         Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
          Frm_StartFormAnchor (ActRenGrp,Grp_GROUPS_SECTION_ID);
          Grp_PutParamGrpCod (Grp->GrpCod);
          fprintf (Gbl.F.Out,"<input type=\"text\" name=\"GrpName\""
@@ -1593,7 +1594,7 @@ static void Grp_ListGroupsForEdition (void)
 
 	 /***** Classroom *****/
 	 /* Start selector */
-	 fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+	 Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
          Frm_StartFormAnchor (ActChgGrpCla,Grp_GROUPS_SECTION_ID);
          Grp_PutParamGrpCod (Grp->GrpCod);
 	 fprintf (Gbl.F.Out,"<select name=\"ClaCod\" style=\"width:100px;\""
@@ -1637,14 +1638,13 @@ static void Grp_ListGroupsForEdition (void)
               Role >= Rol_STD;
               Role--)
            {
-	    fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE\">"
-			       "%d",
-		     Grp->NumUsrs[Role]);
+	    Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
+	    fprintf (Gbl.F.Out,"%d",Grp->NumUsrs[Role]);
 	    Tbl_EndCell ();
            }
 
          /***** Maximum number of students of the group (row[3]) *****/
-         fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+         Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
          Frm_StartFormAnchor (ActChgMaxStdGrp,Grp_GROUPS_SECTION_ID);
          Grp_PutParamGrpCod (Grp->GrpCod);
          fprintf (Gbl.F.Out,"<input type=\"text\" name=\"MaxStudents\""
@@ -1654,6 +1654,7 @@ static void Grp_ListGroupsForEdition (void)
                   Gbl.Form.Id);
          Frm_EndForm ();
          Tbl_EndCell ();
+
          Tbl_EndRow ();
         }
      }
@@ -1737,11 +1738,12 @@ void Grp_ListGrpsToEditAsgAttSvyMch (struct GroupType *GrpTyp,long Cod,
 
       /* Put checkbox to select the group */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE");
+
       if (IBelongToThisGroup)
-	 fprintf (Gbl.F.Out," LIGHT_BLUE");
-      fprintf (Gbl.F.Out,"\">"
-	                 "<input type=\"checkbox\""
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE LIGHT_BLUE\"");
+      else
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"<input type=\"checkbox\""
 	                 " id=\"Grp%ld\" name=\"GrpCods\" value=\"%ld\"",
                Grp->GrpCod,
                Grp->GrpCod);
@@ -2023,10 +2025,11 @@ static bool Grp_ListGrpsForChangeMySelection (struct GroupType *GrpTyp,
 
       /* Put radio item or checkbox to select the group */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE");
+
       if (IBelongToThisGroup)
-         fprintf (Gbl.F.Out," LIGHT_BLUE");
-      fprintf (Gbl.F.Out,"\">");
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE LIGHT_BLUE\"");
+      else
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
 
       if (Gbl.Usrs.Me.Role.Logged == Rol_STD &&	// If I am a student
           !GrpTyp->MultipleEnrolment &&		// ...and the enrolment is single
@@ -2154,10 +2157,10 @@ static void Grp_ListGrpsToAddOrRemUsrs (struct GroupType *GrpTyp,long UsrCod)
       Tbl_StartRow ();
 
       /* Start cell for checkbox */
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE");
       if (UsrBelongsToThisGroup)
-	 fprintf (Gbl.F.Out," LIGHT_BLUE");
-      fprintf (Gbl.F.Out,"\">");
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE LIGHT_BLUE\"");
+      else
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
 
       /* Put checkbox to select the group */
       // Always checkbox, not radio, because the role in the form may be teacher,
@@ -2243,11 +2246,12 @@ static void Grp_ListGrpsForMultipleSelection (struct GroupType *GrpTyp,
 
       /* Put checkbox to select the group */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE");
+
       if (IBelongToThisGroup)
-         fprintf (Gbl.F.Out," LIGHT_BLUE");
-      fprintf (Gbl.F.Out,"\">"
-	                 "<input type=\"checkbox\""
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE LIGHT_BLUE\"");
+      else
+	 Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"<input type=\"checkbox\""
 	                 " id=\"Grp%ld\" name=\"GrpCods\" value=\"%ld\"",
                Grp->GrpCod,
                Grp->GrpCod);
@@ -2283,8 +2287,8 @@ static void Grp_ListGrpsForMultipleSelection (struct GroupType *GrpTyp,
    ICanSelUnselGroup = (Gbl.Usrs.Me.Role.Logged >= Rol_STD);
    Tbl_StartRow ();
 
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"checkbox\" id=\"Grp%ld\" name=\"GrpCods\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"checkbox\" id=\"Grp%ld\" name=\"GrpCods\""
                       " value=\"%ld\"",
             -(GrpTyp->GrpTypCod),
             -(GrpTyp->GrpTypCod));
@@ -2308,17 +2312,17 @@ static void Grp_ListGrpsForMultipleSelection (struct GroupType *GrpTyp,
    Tbl_EndCell ();
 
    /* Column closed/open */
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
    Tbl_EndCell ();
 
    /* Group name = students with no group */
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">"
-	              "<label for=\"Grp%ld\">%s</label>",
+   Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"Grp%ld\">%s</label>",
             -(GrpTyp->GrpTypCod),Txt_users_with_no_group);
    Tbl_EndCell ();
 
    /* Classroom */
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
    Tbl_EndCell ();
 
    /* Number of students who don't belong to any group of this type */
@@ -2326,9 +2330,8 @@ static void Grp_ListGrpsForMultipleSelection (struct GroupType *GrpTyp,
 	Role >= Rol_STD;
 	Role--)
      {
-      fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE\">"
-			 "%lu",
-	       Grp_CountNumUsrsInNoGrpsOfType (Role,GrpTyp->GrpTypCod));
+      Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
+      fprintf (Gbl.F.Out,"%lu",Grp_CountNumUsrsInNoGrpsOfType (Role,GrpTyp->GrpTypCod));
       Tbl_EndCell ();
      }
 
@@ -2356,9 +2359,8 @@ static void Grp_WriteGrpHead (struct GroupType *GrpTyp)
 
    /***** Name of group type *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td colspan=\"9\" class=\"GRP_TITLE LEFT_MIDDLE\">"
-	              "<br />%s",
-	    GrpTyp->GrpTypName);
+   Tbl_StartCellAttr ("colspan=\"9\" class=\"GRP_TITLE LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<br />%s",GrpTyp->GrpTypName);
    if (GrpTyp->MustBeOpened)
      {
       UniqueId++;
@@ -2421,21 +2423,21 @@ static void Grp_WriteRowGrp (struct Group *Grp,bool Highlight)
 	     Grp->Open ? Txt_Group_X_open :
 	                 Txt_Group_X_closed,
              Grp->GrpName);
-   fprintf (Gbl.F.Out,"<td class=\"BM");
    if (Highlight)
-      fprintf (Gbl.F.Out," LIGHT_BLUE");
-   fprintf (Gbl.F.Out,"\" >");
+      Tbl_StartCellAttr ("class=\"BM LIGHT_BLUE\"");
+   else
+      Tbl_StartCellAttr ("class=\"BM\"");
    Ico_PutIconOff (Grp->Open ? "unlock.svg" :
         	               "lock.svg",
 	           Gbl.Title);
    Tbl_EndCell ();
 
    /***** Group name *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE");
    if (Highlight)
-      fprintf (Gbl.F.Out," LIGHT_BLUE");
-   fprintf (Gbl.F.Out,"\">"
-                      "<label for=\"Grp%ld\" class=\"DAT\">"
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE LIGHT_BLUE\"");
+   else
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"Grp%ld\" class=\"DAT\">"
 	              "%s"
 	              "</label>",
 	    Grp->GrpCod,
@@ -2443,12 +2445,11 @@ static void Grp_WriteRowGrp (struct Group *Grp,bool Highlight)
    Tbl_EndCell ();
 
    /***** Classroom *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE");
    if (Highlight)
-      fprintf (Gbl.F.Out," LIGHT_BLUE");
-   fprintf (Gbl.F.Out,"\">"
-	              "%s",
-	    Grp->Classroom.ShrtName);
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE LIGHT_BLUE\"");
+   else
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"%s",Grp->Classroom.ShrtName);
    Tbl_EndCell ();
 
    /***** Current number of users in this group *****/
@@ -2456,29 +2457,28 @@ static void Grp_WriteRowGrp (struct Group *Grp,bool Highlight)
 	Role >= Rol_STD;
 	Role--)
      {
-      fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE");
       if (Highlight)
-	 fprintf (Gbl.F.Out," LIGHT_BLUE");
-      fprintf (Gbl.F.Out,"\">"
-			 "%d",
-	       Grp->NumUsrs[Role]);
+	 Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE LIGHT_BLUE\"");
+      else
+	 Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
+      fprintf (Gbl.F.Out,"%d",Grp->NumUsrs[Role]);
       Tbl_EndCell ();
      }
 
    /***** Max. number of students in this group *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE");
    if (Highlight)
-      fprintf (Gbl.F.Out," LIGHT_BLUE");
-   fprintf (Gbl.F.Out,"\">");
+      Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE LIGHT_BLUE\"");
+   else
+      Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
    Grp_WriteMaxStds (Grp->MaxStudents);
    fprintf (Gbl.F.Out,"&nbsp;");
    Tbl_EndCell ();
 
    /***** Vacants in this group *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE");
    if (Highlight)
-      fprintf (Gbl.F.Out," LIGHT_BLUE");
-   fprintf (Gbl.F.Out,"\">");
+      Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE LIGHT_BLUE\"");
+   else
+      Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
    if (Grp->MaxStudents <= Grp_MAX_STUDENTS_IN_A_GROUP)
      {
       Vacant = (int) Grp->MaxStudents - (int) Grp->NumUsrs[Rol_STD];
@@ -2515,22 +2515,23 @@ static void Grp_PutFormToCreateGroupType (void)
    /***** Write heading *****/
    Grp_WriteHeadingGroupTypes ();
 
-   /***** Column to remove group type, disabled here *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"BM\">");
+
+   /***** Column to remove group type, disabled here *****/
+   Tbl_StartCellAttr ("class=\"BM\"");
    Tbl_EndCell ();
 
    /***** Name of group type *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" name=\"GrpTypName\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" name=\"GrpTypName\""
                       " size=\"12\" maxlength=\"%u\" value=\"%s\""
 	              " required=\"required\" />",
             Grp_MAX_CHARS_GROUP_TYPE_NAME,Gbl.Crs.Grps.GrpTyp.GrpTypName);
    Tbl_EndCell ();
 
    /***** Is it mandatory to register in any groups of this type? *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select name=\"MandatoryEnrolment\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select name=\"MandatoryEnrolment\""
                       " style=\"width:150px;\">"
                       "<option value=\"N\"");
    if (!Gbl.Crs.Grps.GrpTyp.MandatoryEnrolment)
@@ -2546,8 +2547,8 @@ static void Grp_PutFormToCreateGroupType (void)
    Tbl_EndCell ();
 
    /***** Is it possible to register in multiple groups of this type? *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select name=\"MultipleEnrolment\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select name=\"MultipleEnrolment\""
                       " style=\"width:150px;\">"
                       "<option value=\"N\"");
    if (!Gbl.Crs.Grps.GrpTyp.MultipleEnrolment)
@@ -2563,12 +2564,12 @@ static void Grp_PutFormToCreateGroupType (void)
    Tbl_EndCell ();
 
    /***** Open time *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
    Tbl_StartTablePadding (2);
    Tbl_StartRow ();
 
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\" style=\"width:20px;\">"
-                      "<img src=\"%s/clock.svg\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\" style=\"width:20px;\"");
+   fprintf (Gbl.F.Out,"<img src=\"%s/clock.svg\""
                       " alt=\"%s\" title=\"%s\""
                       " class=\"%sCONTEXT_ICO_16x16\" />",
             Cfg_URL_ICON_PUBLIC,
@@ -2580,7 +2581,7 @@ static void Grp_PutFormToCreateGroupType (void)
         	                               "ICO_HIDDEN ");
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
    Dat_WriteFormClientLocalDateTimeFromTimeUTC ("open_time",
                                                 "Open",
                                                 Gbl.Crs.Grps.GrpTyp.OpenTimeUTC,
@@ -2596,8 +2597,8 @@ static void Grp_PutFormToCreateGroupType (void)
    Tbl_EndCell ();
 
    /***** Number of groups of this type *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE\">"
-		      "0");	// It's a new group type ==> 0 groups
+   Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"0");	// It's a new group type ==> 0 groups
    Tbl_EndCell ();
 
    Tbl_EndRow ();
@@ -2637,25 +2638,26 @@ static void Grp_PutFormToCreateGroup (void)
    /***** Write heading *****/
    Grp_WriteHeadingGroups ();
 
-   /***** Empty column to remove *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"BM\">");
+
+   /***** Empty column to remove *****/
+   Tbl_StartCellAttr ("class=\"BM\"");
    Tbl_EndCell ();
 
    /***** Disabled icon to open group *****/
-   fprintf (Gbl.F.Out,"<td class=\"BM\">");
+   Tbl_StartCellAttr ("class=\"BM\"");
    Ico_PutIconOff ("lock.svg",Txt_Group_closed);
    Tbl_EndCell ();
 
    /***** Disabled icon for archive zone *****/
-   fprintf (Gbl.F.Out,"<td class=\"BM\">");
+   Tbl_StartCellAttr ("class=\"BM\"");
    Ico_PutIconOff ("folder-red.svg",Txt_File_zones_disabled);
    Tbl_EndCell ();
 
    /***** Group type *****/
    /* Start selector */
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select name=\"GrpTypCod\" style=\"width:100px;\">");
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select name=\"GrpTypCod\" style=\"width:100px;\">");
 
    /* Options for group types */
    for (NumGrpTyp = 0;
@@ -2676,8 +2678,8 @@ static void Grp_PutFormToCreateGroup (void)
    Tbl_EndCell ();
 
    /***** Group name *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<input type=\"text\" name=\"GrpName\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" name=\"GrpName\""
                       " size=\"20\" maxlength=\"%u\" value=\"%s\""
 	              " required=\"required\" />",
             Grp_MAX_CHARS_GROUP_NAME,Gbl.Crs.Grps.GrpName);
@@ -2685,8 +2687,8 @@ static void Grp_PutFormToCreateGroup (void)
 
    /***** Classroom *****/
    /* Start selector */
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select name=\"ClaCod\" style=\"width:100px;\">");
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select name=\"ClaCod\" style=\"width:100px;\">");
 
    /* Option for no assigned classroom */
    fprintf (Gbl.F.Out,"<option value=\"-1\"");
@@ -2724,14 +2726,14 @@ static void Grp_PutFormToCreateGroup (void)
 	Role >= Rol_STD;
 	Role--)
      {
-      fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_MIDDLE\">"
-			 "0");
+      Tbl_StartCellAttr ("class=\"DAT CENTER_MIDDLE\"");
+      fprintf (Gbl.F.Out,"0");
       Tbl_EndCell ();
      }
 
    /***** Maximum number of students *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-	              "<input type=\"text\" name=\"MaxStudents\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" name=\"MaxStudents\""
 	              " size=\"3\" maxlength=\"10\" value=\"");
    Grp_WriteMaxStds (Gbl.Crs.Grps.MaxStudents);
    fprintf (Gbl.F.Out,"\" />");
diff --git a/swad_help.c b/swad_help.c
index c33e6c45b..4f5da5067 100644
--- a/swad_help.c
+++ b/swad_help.c
@@ -273,13 +273,12 @@ static void Hlp_ShowRowHelpWhatWouldYouLikeToDo (const char *Description,
    Tbl_StartRow ();
 
    /***** Description *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_MIDDLE\">"
-		      "%s:",
-            Description);
+   Tbl_StartCellAttr ("class=\"DAT RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"%s:",Description);
    Tbl_EndCell ();
 
    /***** Button *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
    Frm_StartForm (Action);
    Btn_PutButtonInline (Button,TxtButton);
    Frm_EndForm ();
diff --git a/swad_hierarchy.c b/swad_hierarchy.c
index 8a6051535..e4b517f5c 100644
--- a/swad_hierarchy.c
+++ b/swad_hierarchy.c
@@ -105,12 +105,12 @@ void Hie_WriteMenuHierarchy (void)
           with all the countries *****/
    Tbl_StartRow ();
 
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                      "<label for=\"cty\" class=\"%s\">%s:</label>",
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"cty\" class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Country);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
    Cty_WriteSelectorOfCountry ();
    Tbl_EndCell ();
 
@@ -122,12 +122,12 @@ void Hie_WriteMenuHierarchy (void)
              with the institutions of selected country *****/
       Tbl_StartRow ();
 
-      fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                         "<label for=\"ins\" class=\"%s\">%s:</label>",
+      Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"<label for=\"ins\" class=\"%s\">%s:</label>",
                The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Institution);
       Tbl_EndCell ();
 
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
       Ins_WriteSelectorOfInstitution ();
       Tbl_EndCell ();
 
@@ -139,12 +139,12 @@ void Hie_WriteMenuHierarchy (void)
                 with all the centres of selected institution *****/
          Tbl_StartRow ();
 
-         fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                            "<label for=\"ctr\" class=\"%s\">%s:</label>",
+         Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+         fprintf (Gbl.F.Out,"<label for=\"ctr\" class=\"%s\">%s:</label>",
                   The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Centre);
          Tbl_EndCell ();
 
-         fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+         Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
          Ctr_WriteSelectorOfCentre ();
          Tbl_EndCell ();
 
@@ -156,12 +156,12 @@ void Hie_WriteMenuHierarchy (void)
                    with all the degrees of selected centre *****/
             Tbl_StartRow ();
 
-	    fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                               "<label for=\"deg\" class=\"%s\">%s:</label>",
+	    Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+	    fprintf (Gbl.F.Out,"<label for=\"deg\" class=\"%s\">%s:</label>",
                      The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Degree);
 	    Tbl_EndCell ();
 
-            fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+            Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
             Deg_WriteSelectorOfDegree ();
             Tbl_EndCell ();
 
@@ -173,12 +173,12 @@ void Hie_WriteMenuHierarchy (void)
 		      with all the courses of selected degree *****/
 	       Tbl_StartRow ();
 
-	       fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                                  "<label for=\"crs\" class=\"%s\">%s:</label>",
+	       Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+	       fprintf (Gbl.F.Out,"<label for=\"crs\" class=\"%s\">%s:</label>",
 			The_ClassFormInBox[Gbl.Prefs.Theme],Txt_Course);
 	       Tbl_EndCell ();
 
-	       fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+	       Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
 	       Crs_WriteSelectorOfCourse ();
 	       Tbl_EndCell ();
 
diff --git a/swad_holiday.c b/swad_holiday.c
index 6a1a3d32a..8e57803d8 100644
--- a/swad_holiday.c
+++ b/swad_holiday.c
@@ -151,20 +151,19 @@ void Hld_SeeHolidays (void)
 	    /* Write data of this holiday */
 	    Tbl_StartRow ();
 
-	    fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">"
-			       "%s",
+	    Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+	    fprintf (Gbl.F.Out,"%s",
 		     Gbl.Hlds.Lst[NumHld].PlcCod <= 0 ? Txt_All_places :
 							Gbl.Hlds.Lst[NumHld].PlaceFullName);
 	    Tbl_EndCell ();
 
 	    Dat_ConvDateToDateStr (&Gbl.Hlds.Lst[NumHld].StartDate,StrDate);
-	    fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">"
-			       "&nbsp;%s",
-		     StrDate);
+	    Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+	    fprintf (Gbl.F.Out,"&nbsp;%s",StrDate);
 	    Tbl_EndCell ();
 
-	    fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">"
-			       "&nbsp;");
+	    Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+	    fprintf (Gbl.F.Out,"&nbsp;");
 	    switch (Gbl.Hlds.Lst[NumHld].HldTyp)
 	      {
 	       case Hld_HOLIDAY:
@@ -176,9 +175,8 @@ void Hld_SeeHolidays (void)
 	      }
 	    Tbl_EndCell ();
 
-	    fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">"
-			       "&nbsp;%s",
-		     Gbl.Hlds.Lst[NumHld].Name);
+	    Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+	    fprintf (Gbl.F.Out,"&nbsp;%s",Gbl.Hlds.Lst[NumHld].Name);
 	    Tbl_EndCell ();
 
 	    Tbl_EndRow ();
@@ -566,9 +564,10 @@ static void Hld_ListHolidaysForEdition (void)
      {
       Hld = &Gbl.Hlds.Lst[NumHld];
 
-      /* Put icon to remove holiday */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"BM\">");
+
+      /* Put icon to remove holiday */
+      Tbl_StartCellAttr ("class=\"BM\"");
       Frm_StartForm (ActRemHld);
       Hld_PutParamHldCod (Hld->HldCod);
       Ico_PutIconRemove ();
@@ -576,13 +575,12 @@ static void Hld_ListHolidaysForEdition (void)
       Tbl_EndCell ();
 
       /* Holiday code */
-      fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_MIDDLE\">"
-	                 "%ld&nbsp;",
-               Hld->HldCod);
+      Tbl_StartCellAttr ("class=\"DAT RIGHT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"%ld&nbsp;",Hld->HldCod);
       Tbl_EndCell ();
 
       /* Holiday place */
-      fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
       Frm_StartForm (ActChgHldPlc);
       Hld_PutParamHldCod (Hld->HldCod);
       fprintf (Gbl.F.Out,"<select name=\"PlcCod\" style=\"width:62px;\""
@@ -605,7 +603,7 @@ static void Hld_ListHolidaysForEdition (void)
       Tbl_EndCell ();
 
       /* Holiday type */
-      fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
       Frm_StartForm (ActChgHldTyp);
       Hld_PutParamHldCod (Hld->HldCod);
       fprintf (Gbl.F.Out,"<select name=\"HldTyp\" style=\"width:62px;\""
@@ -624,7 +622,7 @@ static void Hld_ListHolidaysForEdition (void)
       Tbl_EndCell ();
 
       /* Holiday date / Non school period start date */
-      fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
       Frm_StartForm (ActChgHldStrDat);
       Hld_PutParamHldCod (Hld->HldCod);
       Dat_WriteFormDate (Gbl.Now.Date.Year - 1,
@@ -636,7 +634,7 @@ static void Hld_ListHolidaysForEdition (void)
       Tbl_EndCell ();
 
       /* Non school period end date */
-      fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
       Frm_StartForm (ActChgHldEndDat);
       Hld_PutParamHldCod (Hld->HldCod);
       Dat_WriteFormDate (Gbl.Now.Date.Year - 1,
@@ -648,7 +646,7 @@ static void Hld_ListHolidaysForEdition (void)
       Tbl_EndCell ();
 
       /* Holiday name */
-      fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
       Frm_StartForm (ActRenHld);
       Hld_PutParamHldCod (Hld->HldCod);
       fprintf (Gbl.F.Out,"<input type=\"text\" name=\"Name\""
@@ -1000,8 +998,8 @@ static void Hld_PutFormToCreateHoliday (void)
    Tbl_StartRow ();
 
    /***** Holiday place *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select name=\"PlcCod\" style=\"width:62px;\">"
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select name=\"PlcCod\" style=\"width:62px;\">"
                       "<option value=\"-1\"");
    if (Hld_EditingHld->PlcCod <= 0)
       fprintf (Gbl.F.Out," selected=\"selected\"");
@@ -1018,8 +1016,8 @@ static void Hld_PutFormToCreateHoliday (void)
    Tbl_EndCell ();
 
    /***** Holiday type *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select name=\"HldTyp\" style=\"width:62px;\">");
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select name=\"HldTyp\" style=\"width:62px;\">");
    for (HolidayType = (Hld_HolidayType_t) 0;
 	HolidayType < Hld_NUM_TYPES_HOLIDAY;
 	HolidayType++)
@@ -1032,7 +1030,7 @@ static void Hld_PutFormToCreateHoliday (void)
    Tbl_EndCell ();
 
    /***** Holiday date / Non school period start date *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
    Dat_WriteFormDate (Gbl.Now.Date.Year - 1,
 	              Gbl.Now.Date.Year + 1,
 	              "Start",
@@ -1041,7 +1039,7 @@ static void Hld_PutFormToCreateHoliday (void)
    Tbl_EndCell ();
 
    /***** Non school period end date *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
    Dat_WriteFormDate (Gbl.Now.Date.Year - 1,
 	              Gbl.Now.Date.Year + 1,
 	              "End",
@@ -1050,8 +1048,8 @@ static void Hld_PutFormToCreateHoliday (void)
    Tbl_EndCell ();
 
    /***** Holiday name *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<input type=\"text\" name=\"Name\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" name=\"Name\""
                       " size=\"20\" maxlength=\"%u\" value=\"%s\""
                       " required=\"required\" />",
             Hld_MAX_CHARS_HOLIDAY_NAME,Hld_EditingHld->Name);