diff --git a/swad_changelog.h b/swad_changelog.h
index ab3b01d6c..b0161b3e6 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 19.31.22 (2019-10-08)"
+#define Log_PLATFORM_VERSION	"SWAD 19.31.23 (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 19.31.23: Oct 08, 2019	Code refactoring in HTML tables. (247076 lines)
 	Version 19.31.22: Oct 08, 2019	Code refactoring in HTML tables. (247099 lines)
 	Version 19.31.21: Oct 08, 2019	Code refactoring in HTML tables. (247124 lines)
 	Version 19.31.20: Oct 07, 2019	Code refactoring in HTML tables. (247192 lines)
diff --git a/swad_connected.c b/swad_connected.c
index 6a484d049..f2a335de8 100644
--- a/swad_connected.c
+++ b/swad_connected.c
@@ -861,15 +861,13 @@ static void Con_WriteRowConnectedUsrOnRightColumn (Rol_Role_t Role)
    /***** Write time from last access *****/
    Font = (Gbl.Usrs.Connected.Lst[Gbl.Usrs.Connected.NumUsr].ThisCrs ? "CON_SINCE CON_CRS" :
 	                                                               "CON_SINCE CON_NO_CRS");
-
    Tbl_StartCellAttr ("class=\"%s COLOR%u\"",Font,Gbl.RowEvenOdd);
-
    fprintf (Gbl.F.Out,"<div id=\"hm%u\">",
             Gbl.Usrs.Connected.NumUsr);	// Used for automatic update, only when displayed on right column
    Dat_WriteHoursMinutesSecondsFromSeconds (Gbl.Usrs.Connected.Lst[Gbl.Usrs.Connected.NumUsr].TimeDiff);
    fprintf (Gbl.F.Out,"</div>");	// Used for automatic update, only when displayed on right column
-
    Tbl_EndCell ();
+
    Tbl_EndRow ();
 
    if (!ItsMe)
diff --git a/swad_date.c b/swad_date.c
index 8aba614c4..0547ed424 100644
--- a/swad_date.c
+++ b/swad_date.c
@@ -430,14 +430,14 @@ void Dat_PutFormStartEndClientLocalDateTimesWithYesterdayToday (bool SetHMS00000
    Tbl_StartRow ();
 
    /***** Start date-time *****/
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                      "<label class=\"%s\">%s:</label>",
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],
             Txt_START_END_TIME[Dat_START_TIME]);
    Tbl_EndCell ();
 
    /* Date-time */
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
    Dat_WriteFormClientLocalDateTimeFromTimeUTC ("Start",
                                                 "Start",
                                                 Gbl.DateRange.TimeUTC[0],
@@ -450,8 +450,8 @@ void Dat_PutFormStartEndClientLocalDateTimesWithYesterdayToday (bool SetHMS00000
    Tbl_EndCell ();
 
    /***** "Yesterday" and "Today" buttons *****/
-   fprintf (Gbl.F.Out,"<td rowspan=\"2\" class=\"LEFT_MIDDLE\">"
-	              "<input type=\"button\" name=\"Yesterday\" value=\"%s\""
+   Tbl_StartCellAttr ("rowspan=\"2\" class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"button\" name=\"Yesterday\" value=\"%s\""
                       " onclick=\"setDateToYesterday('Start','End');\" />"
 	              "<input type=\"button\" name=\"Today\" value=\"%s\""
                       " onclick=\"setDateToToday('Start','End');\" />",
@@ -463,14 +463,14 @@ void Dat_PutFormStartEndClientLocalDateTimesWithYesterdayToday (bool SetHMS00000
    Tbl_StartRow ();
 
    /***** End date-time *****/
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                      "<label class=\"%s\">%s:</label>",
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label class=\"%s\">%s:</label>",
             The_ClassFormInBox[Gbl.Prefs.Theme],
             Txt_START_END_TIME[Dat_END_TIME]);
    Tbl_EndCell ();
 
    /* Date-time */
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
    Dat_WriteFormClientLocalDateTimeFromTimeUTC ("End",
                                                 "End",
                                                 Gbl.DateRange.TimeUTC[1],
@@ -508,13 +508,13 @@ void Dat_PutFormStartEndClientLocalDateTimes (time_t TimeUTC[2],
       /* Date-time */
       Tbl_StartRow ();
 
-      fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-	                 "<label class=\"%s\">%s:</label>",
+      Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"<label class=\"%s\">%s:</label>",
                The_ClassFormInBox[Gbl.Prefs.Theme],
                Txt_START_END_TIME[StartEndTime]);
       Tbl_EndCell ();
 
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
       Dat_WriteFormClientLocalDateTimeFromTimeUTC (Id[StartEndTime],
                                                    Id[StartEndTime],
 	                                           TimeUTC[StartEndTime],
@@ -561,8 +561,8 @@ void Dat_WriteFormClientLocalDateTimeFromTimeUTC (const char *Id,
    Tbl_StartRow ();
 
    /***** Year *****/
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                      "<select id=\"%sYear\" name=\"%sYear\""
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sYear\" name=\"%sYear\""
                       " onchange=\""
                       "adjustDateForm('%s');"
                       "setUTCFromLocalDateTimeForm('%s');",
@@ -580,8 +580,8 @@ void Dat_WriteFormClientLocalDateTimeFromTimeUTC (const char *Id,
    Tbl_EndCell ();
 
    /***** Month *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select id=\"%sMonth\" name=\"%sMonth\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sMonth\" name=\"%sMonth\""
                       " onchange=\""
                       "adjustDateForm('%s');"
                       "setUTCFromLocalDateTimeForm('%s');",
@@ -599,8 +599,8 @@ void Dat_WriteFormClientLocalDateTimeFromTimeUTC (const char *Id,
    Tbl_EndCell ();
 
    /***** Day *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-	              "<select id=\"%sDay\" name=\"%sDay\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sDay\" name=\"%sDay\""
 	              " onchange=\"setUTCFromLocalDateTimeForm('%s');",
             Id,ParamName,Id);
    if (SubmitFormOnChange)
@@ -616,8 +616,8 @@ void Dat_WriteFormClientLocalDateTimeFromTimeUTC (const char *Id,
    Tbl_EndCell ();
 
    /***** Hour *****/
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-                      "<select id=\"%sHour\" name=\"%sHour\""
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sHour\" name=\"%sHour\""
                       " onchange=\"setUTCFromLocalDateTimeForm('%s');",
             Id,ParamName,Id);
    if (SubmitFormOnChange)
@@ -633,8 +633,8 @@ void Dat_WriteFormClientLocalDateTimeFromTimeUTC (const char *Id,
    Tbl_EndCell ();
 
    /***** Minute *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select id=\"%sMinute\" name=\"%sMinute\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sMinute\" name=\"%sMinute\""
                       " onchange=\"setUTCFromLocalDateTimeForm('%s');",
 	    Id,ParamName,Id);
    if (SubmitFormOnChange)
@@ -654,8 +654,8 @@ void Dat_WriteFormClientLocalDateTimeFromTimeUTC (const char *Id,
    /***** Second *****/
    if (FormSeconds == Dat_FORM_SECONDS_ON)
      {
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-			 "<select id=\"%sSecond\" name=\"%sSecond\""
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"<select id=\"%sSecond\" name=\"%sSecond\""
 			 " onchange=\"setUTCFromLocalDateTimeForm('%s');",
 	       Id,ParamName,Id);
       if (SubmitFormOnChange)
@@ -828,8 +828,8 @@ void Dat_WriteFormDate (unsigned FirstYear,unsigned LastYear,
    Tbl_StartRow ();
 
    /***** Year *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select id=\"%sYear\" name=\"%sYear\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sYear\" name=\"%sYear\""
                       " onchange=\"adjustDateForm('%s');",
 	    Id,Id,Id);
    if (SubmitFormOnChange)
@@ -853,8 +853,8 @@ void Dat_WriteFormDate (unsigned FirstYear,unsigned LastYear,
    Tbl_EndCell ();
 
    /***** Month *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-                      "<select id=\"%sMonth\" name=\"%sMonth\""
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sMonth\" name=\"%sMonth\""
                       " onchange=\"adjustDateForm('%s');",
 	    Id,Id,Id);
    if (SubmitFormOnChange)
@@ -877,9 +877,8 @@ void Dat_WriteFormDate (unsigned FirstYear,unsigned LastYear,
    Tbl_EndCell ();
 
    /***** Day *****/
-   fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
-	              "<select id=\"%sDay\" name=\"%sDay\"",
-            Id,Id);
+   Tbl_StartCellAttr ("class=\"CENTER_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select id=\"%sDay\" name=\"%sDay\"",Id,Id);
    if (SubmitFormOnChange)
       fprintf (Gbl.F.Out," onchange=\"document.getElementById('%s').submit();\"",
                Gbl.Form.Id);
diff --git a/swad_degree.c b/swad_degree.c
index b91cec4f7..4a4dd5688 100644
--- a/swad_degree.c
+++ b/swad_degree.c
@@ -215,16 +215,14 @@ void Deg_SeeDegWithPendingCrss (void)
          Tbl_StartRow ();
 
          /* Degree logo and full name */
-         fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE %s\">",
-                  BgColor);
+         Tbl_StartCellAttr ("class=\"LEFT_MIDDLE %s\"",BgColor);
          Deg_DrawDegreeLogoAndNameWithLink (&Deg,ActSeeCrs,
                                             "DAT_NOBR","CENTER_MIDDLE");
          Tbl_EndCell ();
 
          /* Number of pending courses (row[1]) */
-         fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_MIDDLE %s\">"
-	                    "%s",
-                  BgColor,row[1]);
+         Tbl_StartCellAttr ("class=\"DAT RIGHT_MIDDLE %s\"",BgColor);
+	 fprintf (Gbl.F.Out,"%s",row[1]);
          Tbl_EndCell ();
 
          Tbl_EndRow ();
@@ -346,13 +344,13 @@ static void Deg_Configuration (bool PrintView)
    /***** Centre *****/
    Tbl_StartRow ();
 
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-		      "<label for=\"OthCtrCod\" class=\"%s\">%s:</label>",
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"OthCtrCod\" class=\"%s\">%s:</label>",
 	    The_ClassFormInBox[Gbl.Prefs.Theme],
 	    Txt_Centre);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"DAT_N LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"DAT_N LEFT_MIDDLE\"");
    if (!PrintView &&
        Gbl.Usrs.Me.Role.Logged >= Rol_INS_ADM)
       // Only institution admins and system admin can move a degree to another centre
@@ -388,13 +386,13 @@ static void Deg_Configuration (bool PrintView)
 
    /***** Degree full name *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-		      "<label for=\"FullName\" class=\"%s\">%s:</label>",
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"FullName\" class=\"%s\">%s:</label>",
 	    The_ClassFormInBox[Gbl.Prefs.Theme],
 	    Txt_Degree);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"DAT_N LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"DAT_N LEFT_MIDDLE\"");
    if (!PrintView &&
        Gbl.Usrs.Me.Role.Logged >= Rol_CTR_ADM)
       // Only centre admins, institution admins and system admins
@@ -420,13 +418,13 @@ static void Deg_Configuration (bool PrintView)
    /***** Degree short name *****/
    Tbl_StartRow ();
 
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-		      "<label for=\"ShortName\" class=\"%s\">%s:</label>",
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"ShortName\" class=\"%s\">%s:</label>",
 	    The_ClassFormInBox[Gbl.Prefs.Theme],
 	    Txt_Short_name);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"DAT_N LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"DAT_N LEFT_MIDDLE\"");
    if (!PrintView &&
        Gbl.Usrs.Me.Role.Logged >= Rol_CTR_ADM)
       // Only centre admins, institution admins and system admins
@@ -452,13 +450,13 @@ static void Deg_Configuration (bool PrintView)
 
    /***** Degree WWW *****/
    Tbl_StartRow ();
-   fprintf (Gbl.F.Out,"<td class=\"RIGHT_MIDDLE\">"
-		      "<label for=\"WWW\" class=\"%s\">%s:</label>",
+   Tbl_StartCellAttr ("class=\"RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<label for=\"WWW\" class=\"%s\">%s:</label>",
 	    The_ClassFormInBox[Gbl.Prefs.Theme],
 	    Txt_Web);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
    if (!PrintView &&
        Gbl.Usrs.Me.Role.Logged >= Rol_DEG_ADM)
       // Only degree admins, centre admins, institution admins
@@ -489,14 +487,12 @@ static void Deg_Configuration (bool PrintView)
    /***** Shortcut to the degree *****/
    Tbl_StartRow ();
 
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE\">"
-		      "%s:",
-	    The_ClassFormInBox[Gbl.Prefs.Theme],
-	    Txt_Shortcut);
+   Tbl_StartCellAttr ("class=\"%s RIGHT_MIDDLE\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
+   fprintf (Gbl.F.Out,"%s:",Txt_Shortcut);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">"
-		      "<a href=\"%s/%s?deg=%ld\" class=\"DAT\" target=\"_blank\">"
+   Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<a href=\"%s/%s?deg=%ld\" class=\"DAT\" target=\"_blank\">"
 		      "%s/%s?deg=%ld"
 		      "</a>",
 	    Cfg_URL_SWAD_CGI,
@@ -514,13 +510,11 @@ static void Deg_Configuration (bool PrintView)
       /***** QR code with link to the degree *****/
       Tbl_StartRow ();
 
-      fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE\">"
-			 "%s:",
-	       The_ClassFormInBox[Gbl.Prefs.Theme],
-	       Txt_QR_code);
+      Tbl_StartCellAttr ("class=\"%s RIGHT_MIDDLE\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
+      fprintf (Gbl.F.Out,"%s:",Txt_QR_code);
       Tbl_EndCell ();
 
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
       QR_LinkTo (250,"deg",Gbl.Hierarchy.Deg.DegCod);
       Tbl_EndCell ();
 
@@ -528,18 +522,15 @@ static void Deg_Configuration (bool PrintView)
      }
    else
      {
-      /***** Number of courses *****/
       Tbl_StartRow ();
 
-      fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE\">"
-			 "%s:",
-	       The_ClassFormInBox[Gbl.Prefs.Theme],
-	       Txt_Courses);
+      /***** Number of courses *****/
+      Tbl_StartCellAttr ("class=\"%s RIGHT_MIDDLE\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
+      fprintf (Gbl.F.Out,"%s:",Txt_Courses);
       Tbl_EndCell ();
 
-
       /* Form to go to see courses of this degree */
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
       Frm_StartFormGoTo (ActSeeCrs);
       Deg_PutParamDegCod (Gbl.Hierarchy.Deg.DegCod);
       snprintf (Gbl.Title,sizeof (Gbl.Title),
@@ -595,15 +586,14 @@ static void Deg_ShowNumUsrsInCrssOfDeg (Rol_Role_t Role)
 
    Tbl_StartRow ();
 
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE\">"
-		      "%s:",
-	    The_ClassFormInBox[Gbl.Prefs.Theme],
+   Tbl_StartCellAttr ("class=\"%s RIGHT_MIDDLE\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
+   fprintf (Gbl.F.Out,"%s:",
 	    (Role == Rol_UNK) ? Txt_Users_in_courses :
 		                Txt_ROLES_PLURAL_Abc[Role][Usr_SEX_UNKNOWN]);
    Tbl_EndCell ();
 
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">"
-		      "%u",
+   Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"%u",
             Usr_GetNumUsrsInCrssOfDeg (Role,Gbl.Hierarchy.Deg.DegCod));
    Tbl_EndCell ();
 
@@ -738,9 +728,10 @@ static void Deg_ListDegreesForEdition (void)
 
       ICanEdit = Deg_CheckIfICanEditADegree (Deg);
 
-      /* Put icon to remove degree */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"BM\">");
+
+      /* Put icon to remove degree */
+      Tbl_StartCellAttr ("class=\"BM\"");
       if (NumCrss ||	// Degree has courses ==> deletion forbidden
 	  !ICanEdit)
          Ico_PutIconRemovalNotAllowed ();
@@ -754,19 +745,18 @@ static void Deg_ListDegreesForEdition (void)
       Tbl_EndCell ();
 
       /* Degree code */
-      fprintf (Gbl.F.Out,"<td class=\"DAT CODE\">"
-	                 "%ld",
-               Deg->DegCod);
+      Tbl_StartCellAttr ("class=\"DAT CODE\"");
+      fprintf (Gbl.F.Out,"%ld",Deg->DegCod);
       Tbl_EndCell ();
 
       /* Degree logo */
-      fprintf (Gbl.F.Out,"<td title=\"%s LEFT_MIDDLE\" style=\"width:25px;\">",
-               Deg->FullName);
+      Tbl_StartCellAttr ("title=\"%s LEFT_MIDDLE\" style=\"width:25px;\"",
+                         Deg->FullName);
       Log_DrawLogo (Hie_DEG,Deg->DegCod,Deg->ShrtName,20,NULL,true);
       Tbl_EndCell ();
 
       /* Degree short name */
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
       if (ICanEdit)
 	{
 	 Frm_StartForm (ActRenDegSho);
@@ -783,7 +773,7 @@ static void Deg_ListDegreesForEdition (void)
       Tbl_EndCell ();
 
       /* Degree full name */
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
       if (ICanEdit)
 	{
 	 Frm_StartForm (ActRenDegFul);
@@ -800,7 +790,7 @@ static void Deg_ListDegreesForEdition (void)
       Tbl_EndCell ();
 
       /* Degree type */
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
       if (ICanEdit)
 	{
 	 Frm_StartForm (ActChgDegTyp);
@@ -832,7 +822,7 @@ static void Deg_ListDegreesForEdition (void)
       Tbl_EndCell ();
 
       /* Degree WWW */
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
       if (ICanEdit)
 	{
 	 Frm_StartForm (ActChgDegWWW);
@@ -859,21 +849,20 @@ static void Deg_ListDegreesForEdition (void)
       Tbl_EndCell ();
 
       /* Current number of courses in this degree */
-      fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_MIDDLE\">"
-	                 "%u",
-               NumCrss);
+      Tbl_StartCellAttr ("class=\"DAT RIGHT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"%u",NumCrss);
       Tbl_EndCell ();
 
       /* Degree requester */
       UsrDat.UsrCod = Deg->RequesterUsrCod;
       Usr_ChkUsrCodAndGetAllUsrDataFromUsrCod (&UsrDat,Usr_DONT_GET_PREFS);
-      fprintf (Gbl.F.Out,"<td class=\"DAT INPUT_REQUESTER LEFT_TOP\">");
+      Tbl_StartCellAttr ("class=\"DAT INPUT_REQUESTER LEFT_TOP\"");
       Msg_WriteMsgAuthor (&UsrDat,true,NULL);
       Tbl_EndCell ();
 
       /* Degree status */
       StatusTxt = Deg_GetStatusTxtFromStatusBits (Deg->Status);
-      fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
       if (Gbl.Usrs.Me.Role.Logged >= Rol_CTR_ADM &&
 	  StatusTxt == Deg_STATUS_PENDING)
 	{
@@ -986,21 +975,21 @@ static void Deg_PutFormToCreateDegree (void)
    Tbl_StartRow ();
 
    /***** Column to remove degree, disabled here *****/
-   fprintf (Gbl.F.Out,"<td class=\"BM\">");
+   Tbl_StartCellAttr ("class=\"BM\"");
    Tbl_EndCell ();
 
    /***** Degree code *****/
-   fprintf (Gbl.F.Out,"<td class=\"CODE\">");
+   Tbl_StartCellAttr ("class=\"CODE\"");
    Tbl_EndCell ();
 
    /***** Degree logo *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\" style=\"width:25px;\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\" style=\"width:25px;\"");
    Log_DrawLogo (Hie_DEG,-1L,"",20,NULL,true);
    Tbl_EndCell ();
 
    /***** Degree short name *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" name=\"ShortName\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" name=\"ShortName\""
                       " maxlength=\"%u\" value=\"%s\""
                       " class=\"INPUT_SHORT_NAME\""
                       " required=\"required\" />",
@@ -1008,8 +997,8 @@ static void Deg_PutFormToCreateDegree (void)
    Tbl_EndCell ();
 
    /***** Degree full name *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" name=\"FullName\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" name=\"FullName\""
                       " maxlength=\"%u\" value=\"%s\""
                       " class=\"INPUT_FULL_NAME\""
                       " required=\"required\" />",
@@ -1017,8 +1006,8 @@ static void Deg_PutFormToCreateDegree (void)
    Tbl_EndCell ();
 
    /***** Degree type *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<select name=\"OthDegTypCod\" style=\"width:62px;\">");
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<select name=\"OthDegTypCod\" style=\"width:62px;\">");
    for (NumDegTyp = 0;
 	NumDegTyp < Gbl.DegTypes.Num;
 	NumDegTyp++)
@@ -1034,8 +1023,8 @@ static void Deg_PutFormToCreateDegree (void)
    Tbl_EndCell ();
 
    /***** Degree WWW *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"url\" name=\"WWW\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"url\" name=\"WWW\""
                       " maxlength=\"%u\" value=\"%s\""
                       " class=\"INPUT_WWW\""
                       " required=\"required\" />",
@@ -1043,17 +1032,17 @@ static void Deg_PutFormToCreateDegree (void)
    Tbl_EndCell ();
 
    /***** Current number of courses in this degree *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_MIDDLE\">"
-	              "0");
+   Tbl_StartCellAttr ("class=\"DAT RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"0");
    Tbl_EndCell ();
 
    /***** Degree requester *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT INPUT_REQUESTER LEFT_TOP\">");
+   Tbl_StartCellAttr ("class=\"DAT INPUT_REQUESTER LEFT_TOP\"");
    Msg_WriteMsgAuthor (&Gbl.Usrs.Me.UsrDat,true,NULL);
    Tbl_EndCell ();
 
    /***** Degree status *****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_MIDDLE\">");
+   Tbl_StartCellAttr ("class=\"DAT LEFT_MIDDLE\"");
    Tbl_EndCell ();
 
    Tbl_EndRow ();
@@ -1310,44 +1299,38 @@ static void Deg_ListOneDegreeForSeeing (struct Degree *Deg,unsigned NumDeg)
    Tbl_StartRow ();
 
    /***** Put tip if degree has courses *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s CENTER_MIDDLE %s\" title=\"%s\">"
-		      "%s",
-	    TxtClassNormal,BgColor,
-	    NumCrss ? Txt_DEGREE_With_courses :
-		      Txt_DEGREE_Without_courses,
-	    NumCrss ? "&check;" :
-		      "&nbsp;");
+   Tbl_StartCellAttr ("class=\"%s CENTER_MIDDLE %s\" title=\"%s\"",
+		      TxtClassNormal,BgColor,
+		      NumCrss ? Txt_DEGREE_With_courses :
+			        Txt_DEGREE_Without_courses);
+   fprintf (Gbl.F.Out,"%s",NumCrss ? "&check;" :
+		                     "&nbsp;");
    Tbl_EndCell ();
 
    /***** Number of degree in this list *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE %s\">"
-                      "%u",
-	    TxtClassNormal,BgColor,
-            NumDeg);
+   Tbl_StartCellAttr ("class=\"%s RIGHT_MIDDLE %s\"",TxtClassNormal,BgColor);
+   fprintf (Gbl.F.Out,"%u",NumDeg);
    Tbl_EndCell ();
 
    /***** Degree logo and name *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE %s\">",BgColor);
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE %s\"",BgColor);
    Deg_DrawDegreeLogoAndNameWithLink (Deg,ActSeeCrs,
                                       TxtClassStrong,"CENTER_MIDDLE");
    Tbl_EndCell ();
 
    /***** Type of degree *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_MIDDLE %s\">"
-	              "%s",
-	    TxtClassNormal,BgColor,DegTyp.DegTypName);
+   Tbl_StartCellAttr ("class=\"%s LEFT_MIDDLE %s\"",TxtClassNormal,BgColor);
+   fprintf (Gbl.F.Out,"%s",DegTyp.DegTypName);
    Tbl_EndCell ();
 
    /***** Current number of courses in this degree *****/
-   fprintf (Gbl.F.Out,"<td class=\"%s RIGHT_MIDDLE %s\">"
-	              "%u",
-	    TxtClassNormal,BgColor,NumCrss);
+   Tbl_StartCellAttr ("class=\"%s RIGHT_MIDDLE %s\"",TxtClassNormal,BgColor);
+   fprintf (Gbl.F.Out,"%u",NumCrss);
    Tbl_EndCell ();
 
    /***** Degree status *****/
    StatusTxt = Deg_GetStatusTxtFromStatusBits (Deg->Status);
-   fprintf (Gbl.F.Out,"<td class=\"%s LEFT_MIDDLE %s\">",
-	    TxtClassNormal,BgColor);
+   Tbl_StartCellAttr ("class=\"%s LEFT_MIDDLE %s\"",TxtClassNormal,BgColor);
    if (StatusTxt != Deg_STATUS_ACTIVE) // If active ==> do not show anything
       fprintf (Gbl.F.Out,"%s",Txt_DEGREE_STATUS[StatusTxt]);
    Tbl_EndCell ();
@@ -2549,19 +2532,18 @@ void Hie_GetAndWriteInsCtrDegAdminBy (long UsrCod,unsigned ColSpan)
          Tbl_StartRow ();
 
          /***** Indent *****/
-         fprintf (Gbl.F.Out,"<td class=\"RIGHT_TOP COLOR%u\">"
-                            "<img src=\"%s/%s20x20.gif\""
+         Tbl_StartCellAttr ("class=\"RIGHT_TOP COLOR%u\"",Gbl.RowEvenOdd);
+         fprintf (Gbl.F.Out,"<img src=\"%s/%s20x20.gif\""
                             " alt=\"\" title=\"\""
                             " class=\"ICO25x25\" />",
-                  Gbl.RowEvenOdd,Cfg_URL_ICON_PUBLIC,
+                  Cfg_URL_ICON_PUBLIC,
                   NumRow == NumRows ? "subend" :
                 	              "submid");
          Tbl_EndCell ();
 
          /***** Write institution, centre, degree *****/
-         fprintf (Gbl.F.Out,"<td colspan=\"%u\""
-                            " class=\"DAT_SMALL_NOBR LEFT_TOP COLOR%u\">",
-                  ColSpan - 1,Gbl.RowEvenOdd);
+         Tbl_StartCellAttr ("colspan=\"%u\" class=\"DAT_SMALL_NOBR LEFT_TOP COLOR%u\">",
+                            ColSpan - 1,Gbl.RowEvenOdd);
 
          /* Get next institution, centre, degree */
          row = mysql_fetch_row (mysql_res);
diff --git a/swad_degree_type.c b/swad_degree_type.c
index 0eeeb851c..4a9b657ac 100644
--- a/swad_degree_type.c
+++ b/swad_degree_type.c
@@ -330,23 +330,21 @@ static void DT_ListDegreeTypesForSeeing (void)
 	         Gbl.Hierarchy.Deg.DegTypCod) ? "LIGHT_BLUE" :
                                                 Gbl.ColorRows[Gbl.RowEvenOdd];
 
-      /* Number of degree type in this list */
       Tbl_StartRow ();
-      fprintf (Gbl.F.Out,"<td class=\"DAT_N RIGHT_MIDDLE %s\">"
-			 "%u",
-	       BgColor,NumDegTyp + 1);
+
+      /* Number of degree type in this list */
+      Tbl_StartCellAttr ("class=\"DAT_N RIGHT_MIDDLE %s\"",BgColor);
+      fprintf (Gbl.F.Out,"%u",NumDegTyp + 1);
       Tbl_EndCell ();
 
       /* Name of degree type */
-      fprintf (Gbl.F.Out,"<td class=\"DAT_N LEFT_MIDDLE %s\">"
-	                 "%s",
-               BgColor,Gbl.DegTypes.Lst[NumDegTyp].DegTypName);
+      Tbl_StartCellAttr ("class=\"DAT_N LEFT_MIDDLE %s\"",BgColor);
+      fprintf (Gbl.F.Out,"%s",Gbl.DegTypes.Lst[NumDegTyp].DegTypName);
       Tbl_EndCell ();
 
       /* Number of degrees of this type */
-      fprintf (Gbl.F.Out,"<td class=\"DAT_N RIGHT_MIDDLE %s\">"
-	                 "%u",
-               BgColor,Gbl.DegTypes.Lst[NumDegTyp].NumDegs);
+      Tbl_StartCellAttr ("class=\"DAT_N RIGHT_MIDDLE %s\"",BgColor);
+      fprintf (Gbl.F.Out,"%u",Gbl.DegTypes.Lst[NumDegTyp].NumDegs);
       Tbl_EndCell ();
 
       Tbl_EndRow ();
@@ -403,7 +401,7 @@ static void DT_ListDegreeTypesForEdition (void)
       Tbl_StartRow ();
 
       /* Put icon to remove degree type */
-      fprintf (Gbl.F.Out,"<td class=\"BM\">");
+      Tbl_StartCellAttr ("class=\"BM\"");
       if (Gbl.DegTypes.Lst[NumDegTyp].NumDegs)	// Degree type has degrees => deletion forbidden
          Ico_PutIconRemovalNotAllowed ();
       else
@@ -416,13 +414,12 @@ static void DT_ListDegreeTypesForEdition (void)
       Tbl_EndCell ();
 
       /* Degree type code */
-      fprintf (Gbl.F.Out,"<td class=\"DAT CODE\">"
-	                 "%ld",
-               Gbl.DegTypes.Lst[NumDegTyp].DegTypCod);
+      Tbl_StartCellAttr ("class=\"DAT CODE\"");
+      fprintf (Gbl.F.Out,"%ld",Gbl.DegTypes.Lst[NumDegTyp].DegTypCod);
       Tbl_EndCell ();
 
       /* Name of degree type */
-      fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">");
+      Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
       Frm_StartForm (ActRenDegTyp);
       DT_PutParamOtherDegTypCod (Gbl.DegTypes.Lst[NumDegTyp].DegTypCod);
       fprintf (Gbl.F.Out,"<input type=\"text\" name=\"DegTypName\""
@@ -436,9 +433,8 @@ static void DT_ListDegreeTypesForEdition (void)
       Tbl_EndCell ();
 
       /* Number of degrees of this type */
-      fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_MIDDLE\">"
-	                 "%u",
-               Gbl.DegTypes.Lst[NumDegTyp].NumDegs);
+      Tbl_StartCellAttr ("class=\"DAT RIGHT_MIDDLE\"");
+      fprintf (Gbl.F.Out,"%u",Gbl.DegTypes.Lst[NumDegTyp].NumDegs);
       Tbl_EndCell ();
 
       Tbl_EndRow ();
@@ -479,24 +475,24 @@ static void DT_PutFormToCreateDegreeType (void)
    Tbl_StartRow ();
 
    /***** Column to remove degree type, disabled here *****/
-   fprintf (Gbl.F.Out,"<td class=\"BM\">");
+   Tbl_StartCellAttr ("class=\"BM\"");
    Tbl_EndCell ();
 
    /***** Degree type code *****/
-   fprintf (Gbl.F.Out,"<td class=\"CODE\">");
+   Tbl_StartCellAttr ("class=\"CODE\"");
    Tbl_EndCell ();
 
    /***** Degree type name *****/
-   fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
-                      "<input type=\"text\" name=\"DegTypName\""
+   Tbl_StartCellAttr ("class=\"LEFT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"<input type=\"text\" name=\"DegTypName\""
                       " size=\"25\" maxlength=\"%u\" value=\"%s\""
                       " required=\"required\" />",
             Deg_MAX_CHARS_DEGREE_TYPE_NAME,DT_EditingDegTyp->DegTypName);
    Tbl_EndCell ();
 
    /***** Number of degrees of this degree type ****/
-   fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_MIDDLE\">"
-	              "0");
+   Tbl_StartCellAttr ("class=\"DAT RIGHT_MIDDLE\"");
+   fprintf (Gbl.F.Out,"0");
    Tbl_EndCell ();
 
    Tbl_EndRow ();