diff --git a/module/bug/view/browse.html.php b/module/bug/view/browse.html.php
index 150243cbfc..057916cdfb 100644
--- a/module/bug/view/browse.html.php
+++ b/module/bug/view/browse.html.php
@@ -117,7 +117,7 @@ $currentBrowseType = isset($lang->bug->mySelects[$browseType]) && in_array($brow
         ?>
       </ul>
     </div>
-    <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+    <?php if(common::canModify('product', $product)):?>
     <?php if(!common::checkNotCN()):?>
     <?php
     common::printLink('bug', 'batchCreate', "productID=$productID&branch=$branch&projectID=0&moduleID=$moduleID", "<i class='icon icon-plus'></i>" . $lang->bug->batchCreate, '', "class='btn btn-secondary'");
@@ -189,7 +189,7 @@ $currentBrowseType = isset($lang->bug->mySelects[$browseType]) && in_array($brow
     <div class="table-empty-tip">
       <p>
         <span class="text-muted"><?php echo $lang->bug->noBug;?></span>
-        <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('bug', 'create')):?>
+        <?php if(common::canModify('product', $product) and common::hasPriv('bug', 'create')):?>
         <?php echo html::a($this->createLink('bug', 'create', "productID=$productID&branch=$branch&extra=moduleID=$moduleID"), "<i class='icon icon-plus'></i> " . $lang->bug->create, '', "class='btn btn-info'");?>
         <?php endif;?>
       </p>
@@ -211,7 +211,7 @@ $currentBrowseType = isset($lang->bug->mySelects[$browseType]) && in_array($brow
       $widths  = $this->datatable->setFixedFieldWidth($setting);
       $columns = 0;
 
-      $canBeChanged         = (!empty($config->CRProduct) or $product->status != 'closed');
+      $canBeChanged         = common::canModify('product', $product);
       $canBatchEdit         = ($canBeChanged and common::hasPriv('bug', 'batchEdit'));
       $canBatchConfirm      = ($canBeChanged and common::hasPriv('bug', 'batchConfirm'));
       $canBatchClose        = common::hasPriv('bug', 'batchClose');
diff --git a/module/bug/view/view.html.php b/module/bug/view/view.html.php
index e038ea7a29..5e27574682 100644
--- a/module/bug/view/view.html.php
+++ b/module/bug/view/view.html.php
@@ -30,7 +30,7 @@
   </div>
   <?php if(!isonlybody()):?>
   <div class="btn-toolbar pull-right">
-    <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+    <?php if(common::canModify('product', $product)):?>
     <?php common::printLink('bug', 'create', "productID={$bug->product}&branch={$bug->branch}&extra=moduleID={$bug->module}", "<i class='icon icon-plus'></i>" . $lang->bug->create, '', "class='btn btn-primary'"); ?>
     <?php endif;?>
   </div>
diff --git a/module/common/model.php b/module/common/model.php
index 1e1d28c44c..7d726df500 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -1487,19 +1487,18 @@ EOD;
      */
     public static function hasPriv($module, $method, $object = null)
     {
-        $module  = strtolower($module);
-        $method  = strtolower($method);
-
         global $app, $lang;
 
         /* Check the parent object is closed. */
-        if(strpos('close|batchclose', $method) === false and !commonModel::canBeChanged($module, $object)) return false;
+        if(strpos('close|batchClose', $method) === false and !commonModel::canBeChanged($module, $object)) return false;
 
         /* Check is the super admin or not. */
         if(!empty($app->user->admin) || strpos($app->company->admins, ",{$app->user->account},") !== false) return true;
         /* If not super admin, check the rights. */
         $rights  = $app->user->rights['rights'];
         $acls    = $app->user->rights['acls'];
+        $module  = strtolower($module);
+        $method  = strtolower($method);
 
         if((($app->user->account != 'guest') or ($app->company->guest and $app->user->account == 'guest')) and $module == 'report' and $method == 'annualdata') return true;
 
@@ -1873,6 +1872,25 @@ EOD;
         return true;
     }
 
+    /**
+     * check object can Modify.
+     *
+     * @param  string $type    product|project
+     * @param  object $object
+     * @static
+     * @access public
+     * @return void
+     */
+    public static function canModify($type, $object)
+    {
+        global $config;
+
+        if($type == 'product' and empty($config->CRProduct) and $object->status == 'closed') return false;
+        if($type == 'project' and empty($config->CRProject) and $object->status == 'closed') return false;
+
+        return true;
+    }
+
     /**
      * Response.
      *
diff --git a/module/doc/control.php b/module/doc/control.php
index 5f0cdc16e9..3708b6dbd9 100644
--- a/module/doc/control.php
+++ b/module/doc/control.php
@@ -754,11 +754,6 @@ class doc extends control
         $table  = $type == 'product' ? TABLE_PRODUCT : TABLE_PROJECT;
         $object = $this->dao->select('id,name,status')->from($table)->where('id')->eq($objectID)->fetch();
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if($type == 'product' and empty($this->config->CRProduct) and $object->status == 'closed') $canBeChanged = false;
-        if($type == 'project' and empty($this->config->CRProject) and $object->status == 'closed') $canBeChanged = false;
-
         /* According the from, set menus. */
         if($this->from == 'product')
         {
@@ -813,7 +808,7 @@ class doc extends control
         $this->view->viewType     = $viewType;
         $this->view->orderBy      = $orderBy;
         $this->view->objectID     = $objectID;
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify($type, $object); // Determines whether an object is editable.
 
         $this->display();
     }
@@ -854,11 +849,6 @@ class doc extends control
         $object = $this->dao->select('id,name,status')->from($table)->where('id')->eq($objectID)->fetch();
         if(empty($object)) $this->locate($this->createLink($type, 'create'));
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if($type == 'product' and empty($this->config->CRProduct) and $object->status == 'closed') $canBeChanged = false;
-        if($type == 'project' and empty($this->config->CRProject) and $object->status == 'closed') $canBeChanged = false;
-
         if($from == 'product')
         {
             $this->lang->doc->menu      = $this->lang->product->menu;
@@ -899,7 +889,7 @@ class doc extends control
         $this->view->object       = $object;
         $this->view->from         = $from;
         $this->view->libs         = $this->doc->getLibsByObject($type, $objectID);
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify($type, $object); // Determines whether an object is editable.
         $this->display();
     }
 }
diff --git a/module/product/view/browse.html.php b/module/product/view/browse.html.php
index 5b30688c39..97fec2787d 100644
--- a/module/product/view/browse.html.php
+++ b/module/product/view/browse.html.php
@@ -94,7 +94,7 @@ js::set('foldAll',       $lang->project->treeLevel['root']);
         ?>
       </ul>
     </div>
-    <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+    <?php if(common::canModify('product', $product)):?>
     <?php if(!common::checkNotCN()):?>
     <?php if(common::hasPriv('story', 'batchCreate')) echo html::a($this->createLink('story', 'batchCreate', "productID=$productID&branch=$branch&moduleID=$moduleID"), "<i class='icon icon-plus'></i> {$lang->story->batchCreate}", '', "class='btn btn btn-secondary'");?>
     <?php
@@ -169,7 +169,7 @@ js::set('foldAll',       $lang->project->treeLevel['root']);
     <div class="table-empty-tip">
       <p>
         <span class="text-muted"><?php echo $lang->story->noStory;?></span>
-        <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('story', 'create')):?>
+        <?php if(common::canModify('product', $product) and common::hasPriv('story', 'create')):?>
         <?php echo html::a($this->createLink('story', 'create', "productID={$productID}&branch={$branch}&moduleID={$moduleID}"), "<i class='icon icon-plus'></i> " . $lang->story->create, '', "class='btn btn-info'");?>
         <?php endif;?>
       </p>
@@ -189,7 +189,7 @@ js::set('foldAll',       $lang->project->treeLevel['root']);
       $widths  = $this->datatable->setFixedFieldWidth($setting);
       $columns = 0;
 
-      $canBeChanged         = (!empty($config->CRProduct) or $product->status != 'closed');
+      $canBeChanged         = common::canModify('product', $product);
       $canBatchEdit         = ($canBeChanged and common::hasPriv('story', 'batchEdit'));
       $canBatchClose        = (common::hasPriv('story', 'batchClose') and strtolower($browseType) != 'closedbyme' and strtolower($browseType) != 'closedstory');
       $canBatchReview       = ($canBeChanged and common::hasPriv('story', 'batchReview'));
diff --git a/module/product/view/roadmap.html.php b/module/product/view/roadmap.html.php
index 90ebd428d0..fdfb13fba3 100644
--- a/module/product/view/roadmap.html.php
+++ b/module/product/view/roadmap.html.php
@@ -41,7 +41,7 @@
       <div class="table-empty-tip">
         <p>
           <span class="text-muted"><?php echo $lang->release->noRelease;?></span>
-          <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('release', 'create')):?>
+          <?php if(common::canModify('product', $product) and common::hasPriv('release', 'create')):?>
           <?php echo html::a($this->createLink('release', 'create', "productID=$product->id&branch=$branchKey"), "<i class='icon icon-plus'></i> " . $lang->release->create, '', "class='btn btn-info'");?>
           <?php endif;?>
         </p>
diff --git a/module/productplan/view/browse.html.php b/module/productplan/view/browse.html.php
index 7c732cfa8a..d7e5d9773e 100644
--- a/module/productplan/view/browse.html.php
+++ b/module/productplan/view/browse.html.php
@@ -24,7 +24,7 @@
     <?php endforeach;?>
   </div>
   <div class="btn-toolbar pull-right">
-    <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+    <?php if(common::canModify('product', $product)):?>
     <?php common::printLink('productplan', 'create', "productID=$product->id&branch=$branch", "<i class='icon icon-plus'></i> {$lang->productplan->create}", '', "class='btn btn-primary'");?>
     <?php endif;?>
   </div>
@@ -34,7 +34,7 @@
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->productplan->noPlan;?></span>
-      <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('productplan', 'create')):?>
+      <?php if(common::canModify('product', $product) and common::hasPriv('productplan', 'create')):?>
       <?php echo html::a($this->createLink('productplan', 'create', "productID=$product->id&branch=$branch"), "<i class='icon icon-plus'></i> " . $lang->productplan->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/project/control.php b/module/project/control.php
index 472e050b46..6c406fa7ae 100644
--- a/module/project/control.php
+++ b/module/project/control.php
@@ -128,10 +128,6 @@ class project extends control
         $products  = $this->config->global->flow == 'onlyTask' ? array() : $this->loadModel('product')->getProductsByProject($projectID);
         setcookie('preProjectID', $projectID, $this->config->cookieLife, $this->config->webRoot, '', false, true);
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if(empty($this->config->CRProject) and $project->status == 'closed') $canBeChanged = false;
-
         if($this->cookie->preProjectID != $projectID)
         {
             $_COOKIE['moduleBrowseParam'] = $_COOKIE['productBrowseParam'] = 0;
@@ -221,7 +217,7 @@ class project extends control
         $this->view->memberPairs  = $memberPairs;
         $this->view->branchGroups = $this->loadModel('branch')->getByProducts(array_keys($products), 'noempty');
         $this->view->setModule    = true;
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify('project', $project); // Determines whether an object is editable.
 
         $this->display();
     }
@@ -701,10 +697,6 @@ class project extends control
         $project   = $this->commonAction($projectID);
         $projectID = $project->id;
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if(empty($this->config->CRProject) and $project->status == 'closed') $canBeChanged = false;
-
         /* Load pager. */
         $this->app->loadClass('pager', $static = true);
         $pager = new pager($recTotal, $recPerPage, $pageID);
@@ -783,7 +775,7 @@ class project extends control
         $this->view->users        = $users;
         $this->view->pager        = $pager;
         $this->view->branchGroups = $branchGroups;
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify('project', $project); // Determines whether an object is editable.
 
         $this->display();
     }
@@ -943,10 +935,6 @@ class project extends control
         $project   = $this->commonAction($projectID);
         $projectID = $project->id;
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if(empty($this->config->CRProject) and $project->status == 'closed') $canBeChanged = false;
-
         /* Load pager. */
         $this->app->loadClass('pager', $static = true);
         $pager = pager::init($recTotal, $recPerPage, $pageID);
@@ -967,7 +955,7 @@ class project extends control
         $this->view->tasks        = $productTasks;
         $this->view->users        = $this->loadModel('user')->getPairs('noclosed|noletter');
         $this->view->products     = $this->loadModel('product')->getPairs();
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify('project', $project); // Determines whether an object is editable.
 
         $this->display();
     }
@@ -1063,17 +1051,13 @@ class project extends control
         $project   = $this->commonAction($projectID);
         $projectID = $project->id;
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if(empty($this->config->CRProject) and $project->status == 'closed') $canBeChanged = false;
-
         $title      = $project->name . $this->lang->colon . $this->lang->project->team;
         $position[] = html::a($this->createLink('project', 'browse', "projectID=$projectID"), $project->name);
         $position[] = $this->lang->project->team;
 
         $this->view->title        = $title;
         $this->view->position     = $position;
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify('project', $project); // Determines whether an object is editable.
 
         $this->display();
     }
@@ -1591,10 +1575,6 @@ class project extends control
         $project = $this->project->getById($projectID, true);
         if(!$project) die(js::error($this->lang->notFound) . js::locate('back'));
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if(empty($this->config->CRProject) and $project->status == 'closed') $canBeChanged = false;
-
         $products = $this->project->getProducts($project->id);
         $linkedBranches = array();
         foreach($products as $product)
@@ -1631,7 +1611,7 @@ class project extends control
         $this->view->docLibs      = $this->loadModel('doc')->getLibsByObject('project', $projectID);
         $this->view->statData     = $this->project->statRelatedData($projectID);
         $this->view->chartData    = $chartData;
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify('project', $project); // Determines whether an object is editable.
 
         $this->display();
     }
@@ -1663,8 +1643,7 @@ class project extends control
         $stories = $this->loadModel('story')->getProjectStories($projectID, $orderBy);
 
         /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if(empty($this->config->CRProject) and $project->status == 'closed') $canBeChanged = false;
+        $canBeChanged = common::canModify('project', $project);
 
         $kanbanGroup   = $this->project->getKanbanGroupData($stories, $tasks, $bugs, $type);
         $kanbanSetting = $this->project->getKanbanSetting();
@@ -1855,10 +1834,6 @@ class project extends control
         $stories = $this->loadModel('story')->getProjectStories($projectID);
         $this->loadModel('common')->saveQueryCondition($this->dao->get(), 'story', false);
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if(empty($this->config->CRProject) and $project->status == 'closed') $canBeChanged = false;
-
         /* Get project's product. */
         $productID = 0;
         $productPairs = $this->loadModel('product')->getProductsByProject($projectID);
@@ -1872,7 +1847,7 @@ class project extends control
         $this->view->projectID    = $projectID;
         $this->view->project      = $project;
         $this->view->productID    = $productID;
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify('project', $project); // Determines whether an object is editable.
 
         $this->display();
     }
diff --git a/module/project/view/bug.html.php b/module/project/view/bug.html.php
index c94559635d..9423ad5e81 100644
--- a/module/project/view/bug.html.php
+++ b/module/project/view/bug.html.php
@@ -22,7 +22,7 @@
   </div>
   <div class="btn-toolbar pull-right">
     <?php common::printLink('bug', 'export', "productID=$productID&orderBy=$orderBy&browseType=&projectID=$project->id", "<i class='icon icon-export muted'> </i>" . $lang->bug->export, '', "class='btn btn-link export'");?>
-    <?php if(!empty($this->config->CRProject) or $project->status != 'closed') common::printLink('bug', 'create', "productID=$productID&branch=$branchID&extra=projectID=$project->id", "<i class='icon icon-plus'></i> " . $lang->bug->create, '', "class='btn btn-primary'");?>
+    <?php if(common::canModify('project', $project)) common::printLink('bug', 'create', "productID=$productID&branch=$branchID&extra=projectID=$project->id", "<i class='icon icon-plus'></i> " . $lang->bug->create, '', "class='btn btn-primary'");?>
   </div>
 </div>
 <div id="mainContent">
@@ -31,7 +31,7 @@
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->bug->noBug;?></span>
-      <?php if((!empty($this->config->CRProject) or $project->status != 'closed') and common::hasPriv('bug', 'create')):?>
+      <?php if(common::canModify('project', $project) and common::hasPriv('bug', 'create')):?>
       <?php echo html::a($this->createLink('bug', 'create', "productID=$productID&branch=$branchID&extra=projectID=$project->id"), "<i class='icon icon-plus'></i> " . $lang->bug->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/project/view/build.html.php b/module/project/view/build.html.php
index 35c0ea8330..f62eca6e14 100644
--- a/module/project/view/build.html.php
+++ b/module/project/view/build.html.php
@@ -29,7 +29,7 @@
   </div>
     <a class="btn btn-link querybox-toggle" id="bysearchTab"><i class="icon icon-search muted"></i> <?php echo $lang->project->byQuery;?></a>
   <div class="btn-toolbar pull-right">
-    <?php if(!empty($this->config->CRProject) or $project->status != 'closed') common::printLink('build', 'create', "project=$project->id", "<i class='icon icon-plus'></i> " . $lang->build->create, '', "class='btn btn-primary'");?>
+    <?php if(common::canModify('project', $project)) common::printLink('build', 'create', "project=$project->id", "<i class='icon icon-plus'></i> " . $lang->build->create, '', "class='btn btn-primary'");?>
   </div>
 </div>
 <div id="mainContent">
@@ -38,7 +38,7 @@
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->build->noBuild;?></span>
-      <?php if((!empty($this->config->CRProject) or $project->status != 'closed') and common::hasPriv('build', 'create')):?>
+      <?php if(common::canModify('project', $project) and common::hasPriv('build', 'create')):?>
       <?php echo html::a($this->createLink('build', 'create', "project=$project->id"), "<i class='icon icon-plus'></i> " . $lang->build->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/project/view/burn.html.php b/module/project/view/burn.html.php
index 6eb3e3385b..a992d0ca7b 100644
--- a/module/project/view/burn.html.php
+++ b/module/project/view/burn.html.php
@@ -25,7 +25,7 @@
     common::printLink('project', 'computeBurn', 'reload=yes', '<i class="icon icon-refresh"></i> ' . $lang->project->computeBurn, 'hiddenwin', "title='{$lang->project->computeBurn}{$lang->project->burn}' class='btn btn-primary' id='computeBurn'");
     echo '<div class="space"></div>';
     echo html::a($this->createLink('project', 'burn', "projectID=$projectID&type=$weekend&interval=$interval"), $lang->project->$weekend, '', "class='btn btn-link'");
-    if(!empty($this->config->CRProject) or $project->status != 'closed') common::printLink('project', 'fixFirst', "project=$project->id", $lang->project->fixFirst, '', "class='btn btn-link iframe' data-width='700'");
+    if(common::canModify('project', $project)) common::printLink('project', 'fixFirst', "project=$project->id", $lang->project->fixFirst, '', "class='btn btn-link iframe' data-width='700'");
     echo $lang->project->howToUpdateBurn;
     ?>
     <?php if($interval):?>
diff --git a/module/project/view/grouptask.html.php b/module/project/view/grouptask.html.php
index 53cb155ac2..47cb024004 100644
--- a/module/project/view/grouptask.html.php
+++ b/module/project/view/grouptask.html.php
@@ -53,7 +53,7 @@
         ?>
       </ul>
     </div>
-    <?php if(!empty($this->config->CRProject) or $project->status != 'closed'):?>
+    <?php if(common::canModify('project', $project)):?>
     <div class="btn-group">
       <button class="btn btn-link" data-toggle="dropdown"><i class="icon icon-import muted"></i> <span class="text"><?php echo $lang->import;?></span> <span class="caret"></span></button>
       <ul class="dropdown-menu">
@@ -209,7 +209,7 @@
         <td class="c-type"><?php echo zget($lang->task->typeList, $task->type);?></td>
         <td class='c-date <?php if(isset($task->delay)) echo 'delayed';?>'><?php if(substr($task->deadline, 0, 4) > 0) echo $task->deadline;?></td>
         <td class="c-actions">
-          <?php if(!empty($this->config->CRProject) or $project->status != 'closed'):?>
+          <?php if(common::canModify('project', $project)):?>
           <?php common::printIcon('task', 'assignTo', "projectID=$task->project&taskID=$task->id", $task, 'list', '', '', 'iframe', true);?>
           <?php common::printIcon('task', 'edit', "taskid=$task->id", '', 'list');?>
           <?php common::printIcon('task', 'delete', "projectID=$task->project&taskid=$task->id", '', 'list', 'trash', 'hiddenwin');?>
diff --git a/module/project/view/manageproducts.html.php b/module/project/view/manageproducts.html.php
index 83488b6939..dd56412a0b 100644
--- a/module/project/view/manageproducts.html.php
+++ b/module/project/view/manageproducts.html.php
@@ -57,7 +57,7 @@
       </div>
       <div class="detail text-center form-actions">
         <?php echo html::hidden("post", 'post');?>
-        <?php if(!empty($this->config->CRProject) or $project->status != 'closed') echo html::submitButton();?>
+        <?php if(common::canModify('project', $project)) echo html::submitButton();?>
       </div>
     </form>
   </div>
diff --git a/module/project/view/story.html.php b/module/project/view/story.html.php
index 258487518c..d045e82935 100644
--- a/module/project/view/story.html.php
+++ b/module/project/view/story.html.php
@@ -48,7 +48,7 @@
     <?php
     common::printLink('story', 'export', "productID=$productID&orderBy=id_desc&projectID=$project->id", "<i class='icon icon-export muted'></i> " . $lang->story->export, '', "class='btn btn-link export'");
 
-    if(!empty($this->config->CRProject) or $project->status != 'closed')
+    if(common::canModify('project', $project))
     {
         $this->lang->story->create = $this->lang->project->createStory;
         if($productID and !$this->loadModel('story')->checkForceReview())
@@ -100,7 +100,7 @@
     <div class="table-empty-tip">
       <p>
         <span class="text-muted"><?php echo $lang->story->noStory;?></span>
-        <?php if((!empty($this->config->CRProject) or $project->status != 'closed') and common::hasPriv('project', 'linkStory')):?>
+        <?php if(common::canModify('project', $project) and common::hasPriv('project', 'linkStory')):?>
         <?php echo html::a($this->createLink('project', 'linkStory', "project=$project->id"), "<i class='icon icon-link'></i> " . $lang->project->linkStory, '', "class='btn btn-info'");?>
         <?php endif;?>
       </p>
diff --git a/module/project/view/task.html.php b/module/project/view/task.html.php
index e54212298f..e3807fe637 100644
--- a/module/project/view/task.html.php
+++ b/module/project/view/task.html.php
@@ -118,7 +118,7 @@ js::set('foldAll',     $lang->project->treeLevel['root']);
       </ul>
     </div>
 
-    <?php if(!empty($this->config->CRProject) or $project->status != 'closed'):?>
+    <?php if(common::canModify('project', $project)):?>
     <div class="btn-group dropdown-hover">
       <button class="btn btn-link" data-toggle="dropdown"><i class="icon icon-import muted"></i> <span class="text"><?php echo $lang->import;?></span> <span class="caret"></span></button>
       <ul class="dropdown-menu pull-right" id='importActionMenu'>
diff --git a/module/project/view/testtask.html.php b/module/project/view/testtask.html.php
index 91b4790bc5..41e3f02e56 100644
--- a/module/project/view/testtask.html.php
+++ b/module/project/view/testtask.html.php
@@ -28,7 +28,7 @@
     </a>
   </div>
   <div class="btn-toolbar pull-right">
-    <?php if(!empty($this->config->CRProject) or $project->status != 'closed'):?>
+    <?php if(common::canModify('project', $project)):?>
     <?php common::printIcon('testreport', 'browse', "objectID=$projectID&objectType=project", '', 'button','flag muted');?>
     <?php common::printLink('testtask', 'create', "product=0&project=$projectID", "<i class='icon icon-plus'></i> " . $lang->testtask->create, '', "class='btn btn-primary'");?>
     <?php endif;?>
@@ -39,7 +39,7 @@
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->testtask->noTesttask;?></span>
-      <?php if((!empty($this->config->CRProject) or $project->status != 'closed') and common::hasPriv('testtask', 'create')):?>
+      <?php if(common::canModify('project', $project) and common::hasPriv('testtask', 'create')):?>
       <?php echo html::a($this->createLink('testtask', 'create', "product=0&project=$projectID"), "<i class='icon icon-plus'></i> " . $lang->testtask->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/project/view/tree.html.php b/module/project/view/tree.html.php
index 4053e0be24..254235fade 100644
--- a/module/project/view/tree.html.php
+++ b/module/project/view/tree.html.php
@@ -32,7 +32,7 @@
     $link = common::hasPriv('task', 'report', $project) ?  $this->createLink('task', 'report', "project=$projectID&browseType=$browseType") : '#';
     echo html::a($link, "<i class='icon icon-bar-chart muted'></i> <span class='text'>{$lang->task->reportChart}</span>", '', 'class="btn btn-link"');
     ?>
-    <?php if(!empty($this->config->CRProject) or $project->status != 'closed'):?>
+    <?php if(common::canModify('project', $project)):?>
     <div class="btn-group">
       <button class="btn btn-link" data-toggle="dropdown"><i class="icon icon-import muted"></i> <span class="text"><?php echo $lang->import ?></span> <span class="caret"></span></button>
       <ul class="dropdown-menu">
diff --git a/module/release/view/browse.html.php b/module/release/view/browse.html.php
index e2ec9a29d4..c4ad1dd66e 100644
--- a/module/release/view/browse.html.php
+++ b/module/release/view/browse.html.php
@@ -22,7 +22,7 @@
     ?>
   </div>
   <div class="btn-toolbar pull-right">
-    <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+    <?php if(common::canModify('product', $product)):?>
     <?php common::printLink('release', 'create', "productID=$product->id&branch=$branch", "<i class='icon icon-plus'></i> {$lang->release->create}", '', "class='btn btn-primary'");?>
     <?php endif;?>
   </div>
@@ -32,7 +32,7 @@
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->release->noRelease;?></span>
-      <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('release', 'create')):?>
+      <?php if(common::canModify('product', $product) and common::hasPriv('release', 'create')):?>
       <?php echo html::a($this->createLink('release', 'create', "productID=$product->id&branch=$branch"), "<i class='icon icon-plus'></i> " . $lang->release->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/story/view/view.html.php b/module/story/view/view.html.php
index 1a12f2a158..89951c6e7f 100644
--- a/module/story/view/view.html.php
+++ b/module/story/view/view.html.php
@@ -47,7 +47,7 @@
   </div>
   <?php if(!isonlybody()):?>
   <div class="btn-toolbar pull-right">
-    <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'): ?>
+    <?php if(common::canModify('product', $product)): ?>
     <?php common::printLink('story', 'create', "productID={$story->product}&branch={$story->branch}&moduleID={$story->module}", "<i class='icon icon-plus'></i>" . $lang->story->create, '', "class='btn btn-primary'"); ?>
     <?php endif;?>
   </div>
diff --git a/module/testcase/view/browse.html.php b/module/testcase/view/browse.html.php
index b8fa36aa16..f9d0f6ab8b 100644
--- a/module/testcase/view/browse.html.php
+++ b/module/testcase/view/browse.html.php
@@ -47,7 +47,7 @@ js::set('suiteID',        $suiteID);
     <div class="table-empty-tip">
       <p>
         <span class="text-muted"><?php echo $lang->testcase->noCase;?></span>
-        <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('testcase', 'create')):?>
+        <?php if(common::canModify('product', $product) and common::hasPriv('testcase', 'create')):?>
         <?php $initModule = isset($moduleID) ? (int)$moduleID : 0;?>
         <?php echo html::a($this->createLink('testcase', 'create', "productID=$productID&branch=$branch&moduleID=$initModule"), "<i class='icon icon-plus'></i> " . $lang->testcase->create, '', "class='btn btn-info'");?>
         <?php endif;?>
diff --git a/module/testcase/view/caseheader.html.php b/module/testcase/view/caseheader.html.php
index 418d056822..bfd69d6c0f 100644
--- a/module/testcase/view/caseheader.html.php
+++ b/module/testcase/view/caseheader.html.php
@@ -44,7 +44,7 @@
 
         echo "<div id='bysuiteTab' class='btn-group'>";
         echo html::a('javascript:;', $currentLable . " <span class='caret'></span>", '', "class='btn btn-link' data-toggle='dropdown'");
-        if(!empty($this->config->CRProduct) or $product->status != 'closed')
+        if(common::canModify('product', $product))
         {
             echo "<ul class='dropdown-menu' style='max-height:240px; overflow-y:auto'>";
 
@@ -105,7 +105,7 @@
       ?>
       </ul>
     </div>
-    <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+    <?php if(common::canModify('product', $product)):?>
     <div class='btn-group'>
       <button type='button' class='btn btn-link dropdown-toggle' data-toggle='dropdown' id='importAction'><i class='icon icon-import muted'></i> <?php echo $lang->import ?><span class='caret'></span></button>
       <ul class='dropdown-menu' id='importActionMenu'>
diff --git a/module/testcase/view/groupcase.html.php b/module/testcase/view/groupcase.html.php
index 7685b6349f..cbadcae9d4 100644
--- a/module/testcase/view/groupcase.html.php
+++ b/module/testcase/view/groupcase.html.php
@@ -19,7 +19,7 @@
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->testcase->noCase;?></span>
-      <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('testcase', 'create')):?>
+      <?php if(common::canModify('product', $product) and common::hasPriv('testcase', 'create')):?>
       <?php echo html::a($this->createLink('testcase', 'create', "productID=$productID&branch=$branch&moduleID=$initModule"), "<i class='icon icon-plus'></i> " . $lang->testcase->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/testreport/control.php b/module/testreport/control.php
index 1118021b36..e51a5e5bdb 100644
--- a/module/testreport/control.php
+++ b/module/testreport/control.php
@@ -57,11 +57,6 @@ class testreport extends control
         if($extra) $task = $this->testtask->getById($extra);
         $name = $extra ? $task->name : $object->name;
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = true;
-        if($objectType == 'product' and empty($this->config->CRProduct) and $object->status == 'closed') $canBeChanged = false;
-        if($objectType == 'project' and empty($this->config->CRProject) and $object->status == 'closed') $canBeChanged = false;
-
         /* Load pager. */
         $this->app->loadClass('pager', $static = true);
         if($this->app->getViewType() == 'mhtml') $recPerPage = 10;
@@ -114,7 +109,7 @@ class testreport extends control
         $this->view->users        = $this->user->getPairs('noletter|noclosed|nodeleted');
         $this->view->tasks        = $tasks;
         $this->view->projects     = $projects;
-        $this->view->canBeChanged = $canBeChanged;
+        $this->view->canBeChanged = common::canModify($objectType, $object); // Determines whether an object is editable.
         $this->display();
     }
 
diff --git a/module/testsuite/view/browse.html.php b/module/testsuite/view/browse.html.php
index 9c941b9102..bc9ba76045 100644
--- a/module/testsuite/view/browse.html.php
+++ b/module/testsuite/view/browse.html.php
@@ -21,7 +21,7 @@
       <span class='label label-light label-badge'><?php echo $pager->recTotal;?></span>
     </a>
   </div>
-  <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+  <?php if(common::canModify('product', $product)):?>
   <div class="btn-toolbar pull-right">
     <?php common::printLink('testsuite', 'create', "product=$productID", "<i class='icon icon-plus'></i> " . $lang->testsuite->create, '', "class='btn btn-primary'");?>
   </div>
@@ -33,7 +33,7 @@
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->testsuite->noTestsuite;?></span>
-      <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('testsuite', 'create')):?>
+      <?php if(common::canModify('product', $product) and common::hasPriv('testsuite', 'create')):?>
       <?php echo html::a($this->createLink('testsuite', 'create', "product=$productID"), "<i class='icon icon-plus'></i> " . $lang->testsuite->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/testtask/view/browse.html.php b/module/testtask/view/browse.html.php
index 540d4f7fd8..ecc2d16ffe 100644
--- a/module/testtask/view/browse.html.php
+++ b/module/testtask/view/browse.html.php
@@ -46,7 +46,7 @@ $status = $this->session->testTaskVersionStatus;
       <div class='datepicker-wrapper datepicker-date'><?php echo html::input('date', $endTime, "class='form-control form-date' onchange='changeDate(\"$beginTime\", this.value, \"$condition\")'");?></div>
     </div>
   </div>
-  <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+  <?php if(common::canModify('product', $product)):?>
   <div class="btn-toolbar pull-right">
     <?php common::printLink('testtask', 'create', "product=$productID", "<i class='icon icon-plus'></i> " . $lang->testtask->create, '', "class='btn btn-primary'");?>
   </div>
@@ -58,7 +58,7 @@ $status = $this->session->testTaskVersionStatus;
   <div class="table-empty-tip">
     <p>
       <span class="text-muted"><?php echo $lang->testtask->noTesttask;?></span>
-      <?php if((!empty($this->config->CRProduct) or $product->status != 'closed') and common::hasPriv('testtask', 'create')):?>
+      <?php if(common::canModify('product', $product) and common::hasPriv('testtask', 'create')):?>
       <?php echo html::a($this->createLink('testtask', 'create', "product=$productID"), "<i class='icon icon-plus'></i> " . $lang->testtask->create, '', "class='btn btn-info'");?>
       <?php endif;?>
     </p>
diff --git a/module/testtask/view/browseunits.html.php b/module/testtask/view/browseunits.html.php
index fa234495f6..67e2a679d9 100644
--- a/module/testtask/view/browseunits.html.php
+++ b/module/testtask/view/browseunits.html.php
@@ -23,7 +23,7 @@
     <?php echo html::a(inlink('browseUnits', "productID=$productID&browseType=$key&orderBy=$orderBy"), "<span class='text'>$label</span>", '', "id='{$key}Tab' class='btn btn-link'");?>
     <?php endforeach;?>
   </div>
-  <?php if(!empty($this->config->CRProduct) or $product->status != 'closed'):?>
+  <?php if(common::canModify('product', $product)):?>
   <div class="btn-toolbar pull-right">
     <?php common::printLink('testtask', 'importUnitResult', "product=$productID", "<i class='icon icon-import'></i> " . $lang->testtask->importUnitResult, '', "class='btn btn-primary'");?>
   </div>
diff --git a/module/tree/control.php b/module/tree/control.php
index c92dfdc9b5..adb00759de 100644
--- a/module/tree/control.php
+++ b/module/tree/control.php
@@ -45,7 +45,7 @@ class tree extends control
             $this->view->root = $product;
 
             /* Determines whether an object is editable. */
-            $canBeChanged = (!empty($this->config->CRProduct) or $product->status != 'closed') ? true : false;
+            $canBeChanged = common::canModify('product', $product);
         }
         elseif(strpos($viewType, 'doc') !== false)
         {
@@ -218,9 +218,6 @@ class tree extends control
         $products = $this->project->getProducts($rootID);
         $this->view->products = $products;
 
-        /* Determines whether an object is editable. */
-        $canBeChanged = (!empty($this->config->CRProject) or $project->status != 'closed') ? true : false;
-
         /* Set menu. */
         $this->lang->set('menugroup.tree', 'project');
         $this->project->setMenu($this->project->getPairs(), $rootID);
@@ -250,7 +247,7 @@ class tree extends control
         $this->view->parentModules   = $parentModules;
         $this->view->currentModuleID = $currentModuleID;
         $this->view->tree            = $this->tree->getTaskStructure($rootID, $productID);
-        $this->view->canBeChanged    = $canBeChanged;
+        $this->view->canBeChanged    = common::canModify('product', $product); // Determines whether an object is editable.
         $this->display();
     }