diff --git a/common.php b/common.php
new file mode 100644
index 0000000..ba41752
--- /dev/null
+++ b/common.php
@@ -0,0 +1,5 @@
+<?php
+
+$sThemeDir = 'themes/default/';
+
+/*EOF*/
diff --git a/footer.php b/footer.php
index dc3ced9..3b68316 100644
--- a/footer.php
+++ b/footer.php
@@ -1,5 +1,5 @@
 <?php
- date_default_timezone_set('Europe/Amsterdam');
+    require 'common.php';
 
     $sReadme = '';
     $aReadMeExtensions = array('.html','.md','.txt');
@@ -28,7 +28,7 @@
 
     <?php echo $_SERVER['SERVER_SIGNATURE'] ?>
 
-    <script src="/Directory_Listing_Theme/zepto.min.js"></script>
-    <script src="/Directory_Listing_Theme/functions.js"></script>
+    <script src="/Directory_Listing_Theme/<?= $sThemeDir; ?>zepto.min.js"></script>
+    <script src="/Directory_Listing_Theme/<?= $sThemeDir; ?>functions.js"></script>
 </body>
 </html>
diff --git a/header.php b/header.php
index 65763e5..c24c1fc 100644
--- a/header.php
+++ b/header.php
@@ -1,5 +1,8 @@
 <!DOCTYPE html>
 <?php
+
+    require 'common.php';
+
     if(isset($_SERVER['WEB_ROOT'])){
         $sRoot = $_SERVER['WEB_ROOT'];
     }
@@ -107,8 +110,8 @@
     <meta charset="utf-8" />
     <title>Index of <?= $sIndex;?></title>
 
-	<link href="/Directory_Listing_Theme/dirlisting.css" rel="stylesheet" />
-	<link href="/Directory_Listing_Theme/thumbnails.css" rel="stylesheet" />
+	<link href="/Directory_Listing_Theme/<?= $sThemeDir; ?>dirlisting.css" rel="stylesheet" />
+	<link href="/Directory_Listing_Theme/<?= $sThemeDir; ?>thumbnails.css" rel="stylesheet" />
 
 	<link rel="shortcut icon" type="image/x-icon" href="/favicon.ico">
 </head>
diff --git a/dirlisting.css b/themes/default/dirlisting.css
similarity index 100%
rename from dirlisting.css
rename to themes/default/dirlisting.css
diff --git a/functions.js b/themes/default/functions.js
similarity index 100%
rename from functions.js
rename to themes/default/functions.js
diff --git a/thumbnails.css b/themes/default/thumbnails.css
similarity index 100%
rename from thumbnails.css
rename to themes/default/thumbnails.css
diff --git a/zepto.min.js b/themes/default/zepto.min.js
similarity index 100%
rename from zepto.min.js
rename to themes/default/zepto.min.js
