diff --git a/lib/front/front.class.php b/lib/front/front.class.php
index ce610cb391..6a589976d7 100644
--- a/lib/front/front.class.php
+++ b/lib/front/front.class.php
@@ -352,6 +352,15 @@ class html
  */
 class js
 {
+    /**
+     * Use the svn revision to get the version id.
+     * 
+     * @static
+     * @var string
+     * @access public
+     */
+    static $version = '$Id';
+
     /**
      * Import a js file.
      * 
@@ -362,6 +371,7 @@ class js
      */
     public static function import($url, $version = '')
     {
+        if(!$version) $version = self::$version;
         echo "<script src='$url?v=$version' type='text/javascript'></script>\n";
     }
 
@@ -626,6 +636,15 @@ EOT;
  */
 class css
 {
+    /**
+     * Use the svn revision to get the version id.
+     * 
+     * @static
+     * @var string
+     * @access public
+     */
+    static $version = '$Id';
+
     /**
      * Import a css file.
      * 
@@ -636,6 +655,7 @@ class css
      */
     public static function import($url, $version = '')
     {
+        if(!$version) $version = self::$version;
         echo "<link rel='stylesheet' href='$url?v=$version' type='text/css' media='screen' />\n";
     }