* finish task #6466.

module/tree/lang/zh-cn.php

@@ -39,6 +39,7 @@ $lang->tree->addChild           = "增加子模块";
 $lang->tree->confirmDelete      = '该模块及其子模块都会被删除，您确定删除吗？';
 $lang->tree->confirmDeleteLine  = "您确定删除该{$lang->productCommon}线吗？";
 $lang->tree->confirmRoot        = "模块的所属{$lang->productCommon}修改，会关联修改该模块下的需求、Bug、用例的所属{$lang->productCommon}，以及{$lang->projectCommon}和{$lang->productCommon}的关联关系。该操作比较危险，请谨慎操作。是否确认修改？";
+$lang->tree->confirmRoot4Doc    = "模块的所属文档库修改，会关联修改该模块下的文档的关联关系。该操作比较危险，请谨慎操作。是否确认修改？";
 $lang->tree->successSave        = '成功保存';
 $lang->tree->successFixed       = '成功修正数据！';
 $lang->tree->repeatName         = '模块名“%s”已经存在！';

module/tree/view/edit.html.php

@@ -83,16 +83,16 @@ function getProductModules(productID)
 }
 $(function()
 {
-    if(type == 'doc') return;
     $('#root').change(function()
     {
         if($(this).val() == currentRoot) return true;
-        if(!confirm('<?php echo $lang->tree->confirmRoot?>'))
+        var confirmRoot = <?php echo json_encode($type == 'doc' ? $lang->tree->confirmRoot4Doc : $lang->tree->confirmRoot);?>;
+        if(!confirm(confirmRoot))
         {
             $('#root').val(currentRoot);
             $('#root').trigger('chosen:updated');
         }
-        getProductModules($(this).val());
+        if(type != 'doc') getProductModules($(this).val());
     })
 })
 function loadDocModule(libID)