diff --git a/swad_changelog.h b/swad_changelog.h
index cc3c8f86..2f114b48 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -98,11 +98,12 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 15.6.1 (2015/10/03)"
+#define Log_PLATFORM_VERSION	"SWAD 15.6.2 (2015/10/03)"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*.h sql/swad*.sql | tail -1
 /*
+        Version 15.6.2:   Oct 03, 2015	Changes in layout of file browsers. (184963 lines)
         Version 15.6.1:   Oct 03, 2015	Changes in layout of file browsers. (184956 lines)
         Version 15.6  :   Oct 02, 2015	Now a click in a form may go to a part of the destination page. (184959 lines)
         Version 15.5.2:   Oct 02, 2015	Changes in layout of tests exams. (184934 lines)
diff --git a/swad_file_browser.c b/swad_file_browser.c
index 170220d1..27ce83be 100644
--- a/swad_file_browser.c
+++ b/swad_file_browser.c
@@ -3312,7 +3312,8 @@ static void Brw_ShowFileBrowser (void)
    Gbl.FileBrowser.Clipboard.IsThisTree = Brw_CheckIfClipboardIsInThisTree ();
 
    /***** Start frame *****/
-   fprintf (Gbl.F.Out,"<section id=\"file_browser\">");
+   Gbl.FileBrowser.Id++;
+   fprintf (Gbl.F.Out,"<section id=\"file_browser_%u\">",Gbl.FileBrowser.Id);
    Lay_StartRoundFrameTable ("95%",0,Brw_TitleOfFileBrowser[Gbl.FileBrowser.Type]);
 
    /***** Title *****/
@@ -5203,6 +5204,7 @@ static void Brw_IndentAndWriteIconExpandContract (unsigned Level,Brw_ExpandTree_
   {
    extern const char *Txt_Expand_FOLDER_X;
    extern const char *Txt_Contract_FOLDER_X;
+   char Anchor[32];
 
    fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
 	              "<table>"
@@ -5220,7 +5222,8 @@ static void Brw_IndentAndWriteIconExpandContract (unsigned Level,Brw_ExpandTree_
          break;
       case Brw_EXPAND_TREE_PLUS:
          /***** Form to expand folder *****/
-         Act_FormStartAnchor (Brw_ActExpandFolder[Gbl.FileBrowser.Type],"file_browser");
+	 sprintf (Anchor,"file_browser_%u",Gbl.FileBrowser.Id);
+         Act_FormStartAnchor (Brw_ActExpandFolder[Gbl.FileBrowser.Type],Anchor);
          switch (Gbl.FileBrowser.Type)
            {
             case Brw_SHOW_DOCUM_GRP:
@@ -5251,7 +5254,8 @@ static void Brw_IndentAndWriteIconExpandContract (unsigned Level,Brw_ExpandTree_
          break;
       case Brw_EXPAND_TREE_MINUS:
          /***** Form to contract folder *****/
-         Act_FormStartAnchor (Brw_ActContractFolder[Gbl.FileBrowser.Type],"file_browser");
+	 sprintf (Anchor,"file_browser_%u",Gbl.FileBrowser.Id);
+         Act_FormStartAnchor (Brw_ActContractFolder[Gbl.FileBrowser.Type],Anchor);
          switch (Gbl.FileBrowser.Type)
            {
             case Brw_SHOW_DOCUM_GRP:
diff --git a/swad_global.c b/swad_global.c
index 71019855..25e07fbb 100644
--- a/swad_global.c
+++ b/swad_global.c
@@ -427,6 +427,7 @@ void Gbl_InitializeGlobals (void)
    Gbl.Usrs.Me.UsrDat.Nickname[0] = '\0';
 
    /* File browser */
+   Gbl.FileBrowser.Id = 0;
    Gbl.FileBrowser.Type = Brw_UNKNOWN;
    Gbl.FileBrowser.FileType = Brw_IS_UNKNOWN;
    Gbl.FileBrowser.UploadingWithDropzone = false;
diff --git a/swad_global.h b/swad_global.h
index e8f25379..17340cd6 100644
--- a/swad_global.h
+++ b/swad_global.h
@@ -484,6 +484,7 @@ struct Globals
      } LstExamAnnouncements;
    struct
      {
+      unsigned Id;		// Each file browser in the page has a unique identifier
       Brw_FileBrowser_t Type;
       bool FullTree;		// Show full tree?
       bool ShowOnlyPublicFiles;	// Show only public files?