diff --git a/lib/form/filemanager.js b/lib/form/filemanager.js
index 6db26cf09ca..be6b47995f1 100644
--- a/lib/form/filemanager.js
+++ b/lib/form/filemanager.js
@@ -16,10 +16,6 @@ var filemanager = (function(){
         this.init = function(client_id, options) {
             this.client_id = client_id;
             var container = document.getElementById('filemanager-' + client_id);
-            fm_cfg[client_id] = {};
-            fm_cfg[client_id] = options;
-            fm_cfg[client_id].mainfile = options.mainfile;
-            fm_cfg[client_id].currentpath = '/';
             html_compiler(client_id, options);
         }
     }
@@ -182,7 +178,7 @@ function html_compiler(client_id, options) {
         list[i].action = action;
         var url = "###";
         var ismainfile = false;
-        if (fm_cfg[client_id].mainfilename && (fm_cfg[client_id].mainfilename == list[i].fullname)) {
+        if (fm_cfg[client_id].mainfilename && (fm_cfg[client_id].mainfilename.toLowerCase() == list[i].fullname.toLowerCase())) {
             ismainfile = true;
         }
         switch (list[i].type) {
@@ -584,12 +580,13 @@ function create_menu(ev, menuid, menuitems, file, options) {
     if (fm_cfg[options.client_id].mainfile && (file.type!='folder')) {
         this.set_mainfile = function(type, ev, obj) {
             if (fm_cfg[obj.client_id].mainfile) {
-                var mainfile = document.getElementById(fm_cfg[obj.client_id].mainfile);
+                var mainfile = document.getElementById(fm_cfg[obj.client_id].mainfile+'-id');
                 mainfile.value = this.file.filepath+this.file.fullname;
-                //mainfile.disabled = true;
+                document.getElementById(fm_cfg[obj.client_id].mainfile+'-label').innerHTML = mainfile.value;
             }
             fm_cfg[obj.client_id].mainfilename = this.file.fullname;
             refresh_filemanager(fm_cfg[obj.client_id].currentpath, fm_cfg[obj.client_id]);
+
         }
         this.set_mainfile.file = file;
         menu.addItem({text: mstr.resource.setmainfile, onclick: {fn: this.set_mainfile, obj: options, scope: this.set_mainfile}});
@@ -605,12 +602,27 @@ function setup_filebrowser(client_id, options) {
     if (!options) {
         options = {};
     }
-    var fm = new filemanager();
-    fm.init(client_id, options);
+    fm_cfg[client_id] = {};
+    fm_cfg[client_id] = options;
+    fm_cfg[client_id].mainfile = options.mainfile;
+    fm_cfg[client_id].currentpath = '/';
+    fm_cfg[client_id].currentfiles = 0; 
     // XXX: When editing existing folder, currentfiles shouldn't
     // be 0
-    fm_cfg[client_id].currentfiles = 0; 
     fm_cfg[client_id].maxfiles = options.maxfiles; 
+    if (options.mainfile) {
+        var mainfilename = document.getElementById(options.mainfile+'-id');
+        if (mainfilename.value) {
+            var re = new RegExp(".*\/(.*)$", "i");
+            var result = mainfilename.value.match(re);
+            document.getElementById(options.mainfile+'-label').innerHTML = mainfilename.value;
+            fm_cfg[client_id].mainfilename = result[1];
+        } else {
+            fm_cfg[client_id].mainfilename = '';
+        }
+    }
+    var fm = new filemanager();
+    fm.init(client_id, options);
     setup_buttons(client_id, options);
 }
 
diff --git a/mod/resource/mod_form.php b/mod/resource/mod_form.php
index f457b9c5008..33a86461cec 100644
--- a/mod/resource/mod_form.php
+++ b/mod/resource/mod_form.php
@@ -56,9 +56,14 @@ class mod_resource_mod_form extends moodleform_mod {
 
         //-------------------------------------------------------
         $mform->addElement('header', 'contentsection', get_string('contentheader', 'resource'));
-        $options = array('mainfile'=>'id_mainfile', 'subdirs'=>0, 'maxbytes'=>0, 'maxfiles'=>-1, 'filetypes'=>'*', 'returnvalue'=>'*');
+        $mainfile = 'mainfile';
+
+        $options = array('mainfile'=>$mainfile, 'subdirs'=>0, 'maxbytes'=>0, 'maxfiles'=>-1, 'filetypes'=>'*', 'returnvalue'=>'*');
+
+        $mform->addElement('hidden', $mainfile, '', array('id'=>$mainfile.'-id'));
+        $mform->addElement('static', '', 'Main file', '<div id="'.$mainfile.'-label"></div>');
         $mform->addElement('filemanager', 'files', get_string('file'), null, $options);
-        $mform->addElement('text', 'mainfile', 'Main file');
+
         //-------------------------------------------------------
         $mform->addElement('header', 'optionssection', get_string('optionsheader', 'resource'));