diff --git a/code/CMSMain.php b/code/CMSMain.php
index 52bb1a6d..dacdd7d5 100755
--- a/code/CMSMain.php
+++ b/code/CMSMain.php
@@ -81,7 +81,7 @@ class CMSMain extends LeftAndMain implements CurrentPageIdentifier, PermissionPr
 		HtmlEditorConfig::get('cms')->setOption('spellchecker_languages', "+{$langName}={$this->Locale}");
 				
 		Requirements::javascript(CMS_DIR . '/javascript/CMSMain.js');
-		Requirements::javascript(CMS_DIR . '/javascript/CMSMain_left.js');
+		Requirements::javascript(CMS_DIR . '/javascript/CMSMain.Tree.js');
 		
 		Requirements::javascript(CMS_DIR . '/javascript/CMSMain.BatchActions.js');
 		Requirements::javascript(CMS_DIR . '/javascript/CMSMain.Translatable.js');
diff --git a/code/LeftAndMain.php b/code/LeftAndMain.php
index 2bf4c2ec..3938316d 100644
--- a/code/LeftAndMain.php
+++ b/code/LeftAndMain.php
@@ -228,7 +228,7 @@ class LeftAndMain extends Controller {
 		Requirements::css(THIRDPARTY_DIR . '/tree/tree.css');
 		
 		Requirements::javascript(CMS_DIR . '/javascript/LeftAndMain.js');
-		Requirements::javascript(CMS_DIR . '/javascript/LeftAndMain_left.js');
+		Requirements::javascript(CMS_DIR . '/javascript/LeftAndMain.Tree.js');
 		Requirements::javascript(CMS_DIR . '/javascript/LeftAndMain.EditForm.js');
 	
 		Requirements::javascript(CMS_DIR . '/javascript/SideTabs.js');
diff --git a/javascript/CMSMain_left.js b/javascript/CMSMain.Tree.js
old mode 100755
new mode 100644
similarity index 100%
rename from javascript/CMSMain_left.js
rename to javascript/CMSMain.Tree.js
diff --git a/javascript/LeftAndMain_left.js b/javascript/LeftAndMain.Tree.js
similarity index 100%
rename from javascript/LeftAndMain_left.js
rename to javascript/LeftAndMain.Tree.js