diff --git a/module/execution/js/task.js b/module/execution/js/task.js
index d96b1ac4cc..20f58c4146 100644
--- a/module/execution/js/task.js
+++ b/module/execution/js/task.js
@@ -9,7 +9,7 @@ $(function()
         $td.find('a').eq(0).css('max-width', $td.width() - labelWidth - 60);
     });
 
-    toggleFold('#executionTaskForm', unfoldTasks, executionID, 'project');
+    toggleFold('#executionTaskForm', unfoldTasks, executionID, 'execution');
 
     adjustTableFooter();
     $('body').on('click', '#toggleFold', adjustTableFooter);
diff --git a/module/misc/control.php b/module/misc/control.php
index be72800419..0767ea4031 100644
--- a/module/misc/control.php
+++ b/module/misc/control.php
@@ -236,6 +236,53 @@ class misc extends control
         $captcha->build()->output();
     }
 
+    /**
+     * Ajax set unfoldID.
+     *
+     * @param  int    $objectID
+     * @param  string $objectType
+     * @param  string $action       add|delete
+     * @access public
+     * @return void
+     */
+    public function ajaxSetUnfoldID($objectID, $objectType, $action = 'add')
+    {
+        $account = $this->app->user->account;
+        if($objectType == 'execution')
+        {
+            $condition   = "owner={$account}&module={$objectType}&section=task&key=unfoldTasks";
+            $settingPath = $account . ".{$objectType}.task.unfoldTasks";
+        }
+        else
+        {
+            $condition   = "owner={$account}&module=product&section=browse&key=unfoldStories";
+            $settingPath = $account . ".{$objectType}.browse.unfoldStories";
+        }
+
+        $this->loadModel('setting');
+        $setting     = $this->setting->createDAO($this->setting->parseItemParam($condition), 'select')->fetch();
+        $newUnfoldID = $this->post->newUnfoldID;
+        if(empty($newUnfoldID)) die();
+
+        $newUnfoldID  = json_decode($newUnfoldID);
+        $unfoldIdList = $setting ? json_decode($setting->value, true) : array();
+        foreach($newUnfoldID as $unfoldID)
+        {
+            unset($unfoldIdList[$objectID][$unfoldID]);
+            if($action == 'add') $unfoldIdList[$objectID][$unfoldID] = $unfoldID;
+        }
+
+        if(empty($setting))
+        {
+            $this->setting->setItem($settingPath, json_encode($unfoldIdList));
+        }
+        else
+        {
+            $this->dao->update(TABLE_CONFIG)->set('value')->eq(json_encode($unfoldIdList))->where('id')->eq($setting->id)->exec();
+        }
+        die('success');
+    }
+
     /**
      * Get annual remind.
      *