diff --git a/htdocs/product/stock/mouvementstock.class.php b/htdocs/product/stock/mouvementstock.class.php
new file mode 100644
index 00000000000..ce420a0b4ee
--- /dev/null
+++ b/htdocs/product/stock/mouvementstock.class.php
@@ -0,0 +1,80 @@
+<?PHP
+/* Copyright (C) 2003 Rodolphe Quiedeville <rodolphe@quiedeville.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * $Id$
+ * $Source$
+ *
+ */
+
+class MouvementStock
+{
+
+  Function MouvementStock($DB)
+    {
+      $this->db = $DB;
+    }
+  /*
+   *
+   *
+   */
+  Function _create($user, $product_id, $entrepot_id, $qty, $type, $transaction=1) 
+    {
+
+      if ($this->db->begin($transaction) )
+	{
+	  
+	  $sql = "INSERT INTO llx_stock_mouvement (datem, fk_product, fk_entrepot, value, type_mouvement, fk_user_author)";
+	  $sql .= " VALUES (now(), $product_id, $entrepot_id, $qty, $type, $user->id)";
+	  
+	  if ($this->db->query($sql))
+	    {
+
+	      $sql = "UPDATE llx_product_stock SET reel = reel + $qty WHERE fk_entrepot = $entrepot_id AND fk_product = $product_id";
+
+	      if ($this->db->query($sql))
+		{
+		  return 1;
+		}
+	      else
+		{
+		  print $this->db->error() . "<br>$sql<br>";
+		  return 0;
+		}
+	    }
+	  else
+	    {
+	      print $this->db->error() . "<br>$sql<br>";
+	      return 0;
+	    }
+	}
+      else
+	{
+	  return 0;
+	}
+    }
+  /*
+   *
+   *
+   */
+  Function livraison($user, $product_id, $entrepot_id, $qty, $transaction=1) 
+    {
+
+      return $this->_create($user, $product_id, $entrepot_id, (0 - $qty), 2, $transaction);
+
+    }
+}
+?>