diff --git a/htdocs/install/check.php b/htdocs/install/check.php
index 9e21b994780068e938e2d1e0abaed0617e4eb68f..66a9f7f77bb306cc26247f3616f0136140400d65 100644
--- a/htdocs/install/check.php
+++ b/htdocs/install/check.php
@@ -392,7 +392,8 @@ else
 								array('from'=>'3.6.0', 'to'=>'3.7.0'),
 								array('from'=>'3.7.0', 'to'=>'3.8.0'),
 		                        array('from'=>'3.8.0', 'to'=>'3.9.0'),
-		                        array('from'=>'3.9.0', 'to'=>'4.0.0')
+		                        array('from'=>'3.9.0', 'to'=>'4.0.0'),
+		                        array('from'=>'4.0.0', 'to'=>'5.0.0')
 		);
 
 		$count=0;
diff --git a/htdocs/install/mysql/migration/4.0.0-5.0.0.sql b/htdocs/install/mysql/migration/4.0.0-5.0.0.sql
new file mode 100644
index 0000000000000000000000000000000000000000..849a71c935fbec91dbee4998d5bc5cc52185b38e
--- /dev/null
+++ b/htdocs/install/mysql/migration/4.0.0-5.0.0.sql
@@ -0,0 +1,29 @@
+--
+-- Be carefull to requests order.
+-- This file must be loaded by calling /install/index.php page
+-- when current version is 4.0.0 or higher.
+--
+-- To rename a table:       ALTER TABLE llx_table RENAME TO llx_table_new;
+-- To add a column:         ALTER TABLE llx_table ADD COLUMN newcol varchar(60) NOT NULL DEFAULT '0' AFTER existingcol;
+-- To rename a column:      ALTER TABLE llx_table CHANGE COLUMN oldname newname varchar(60);
+-- To drop a column:        ALTER TABLE llx_table DROP COLUMN oldname;
+-- To change type of field: ALTER TABLE llx_table MODIFY COLUMN name varchar(60);
+-- To drop a foreign key:   ALTER TABLE llx_table DROP FOREIGN KEY fk_name;
+-- To drop an index:        -- VMYSQL4.0 DROP INDEX nomindex on llx_table
+-- To drop an index:        -- VPGSQL8.0 DROP INDEX nomindex
+-- To restrict request to Mysql version x.y minimum use -- VMYSQLx.y
+-- To restrict request to Pgsql version x.y minimum use -- VPGSQLx.y
+-- To make pk to be auto increment (mysql):    VMYSQL4.3 ALTER TABLE llx_c_shipment_mode CHANGE COLUMN rowid rowid INTEGER NOT NULL AUTO_INCREMENT;
+-- To make pk to be auto increment (postgres): VPGSQL8.2 NOT POSSIBLE. MUST DELETE/CREATE TABLE
+-- To set a field as NULL:                     VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name DROP NOT NULL;
+-- To set a field as default NULL:             VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name SET DEFAULT NULL;
+-- Note: fields with type BLOB/TEXT can't have default value.
+-- -- VPGSQL8.2 DELETE FROM llx_usergroup_user      WHERE fk_user      NOT IN (SELECT rowid from llx_user);
+-- -- VMYSQL4.1 DELETE FROM llx_usergroup_user      WHERE fk_usergroup NOT IN (SELECT rowid from llx_usergroup);
+
+
+ALTER TABLE llx_website ADD COLUMN virtualhost   varchar(255) after fk_default_home;
+
+
+
+
diff --git a/htdocs/install/mysql/tables/llx_website.sql b/htdocs/install/mysql/tables/llx_website.sql
index 8dd257ffa697200d352135845cf3ce41e50d2bbf..331e6b085bdc6006298d7ac1d23d6b6c95f4bf29 100644
--- a/htdocs/install/mysql/tables/llx_website.sql
+++ b/htdocs/install/mysql/tables/llx_website.sql
@@ -25,6 +25,7 @@ CREATE TABLE llx_website
 	description   varchar(255),
 	status		  integer,
 	fk_default_home integer, 
+	virtualhost   varchar(255), 
     date_creation     datetime,
     date_modification datetime,
 	tms           timestamp
diff --git a/htdocs/websites/class/website.class.php b/htdocs/websites/class/website.class.php
index e87e830bb770af45c17cfd88cbc77ac0ee2cfffb..a3760a792cec88a933ba809ee357c471dde7dee6 100644
--- a/htdocs/websites/class/website.class.php
+++ b/htdocs/websites/class/website.class.php
@@ -85,6 +85,12 @@ class Website extends CommonObject
 	 * @var integer
 	 */
 	public $fk_default_home;
+	/**
+	 * @var string
+	 */
+	public $virtualhost;
+	
+	
 	public $records;
 	
 	/**
@@ -143,7 +149,8 @@ class Website extends CommonObject
 		$sql.= 'ref,';
 		$sql.= 'description,';
 		$sql.= 'status,';
-        $sql.= 'fk_default_home,';
+		$sql.= 'fk_default_home,';
+		$sql.= 'virtualhost,';
 		$sql.= 'date_creation,';
 		$sql.= 'date_modification';
 		
@@ -154,6 +161,7 @@ class Website extends CommonObject
 		$sql .= ' '.(! isset($this->description)?'NULL':"'".$this->db->escape($this->description)."'").',';
 		$sql .= ' '.(! isset($this->status)?'NULL':$this->status).',';
 		$sql .= ' '.(! isset($this->fk_default_home)?'NULL':$this->fk_default_home).',';
+		$sql .= ' '.(! isset($this->virtualhost)?'NULL':$this->virtualhost).',';
 		$sql .= ' '.(! isset($this->date_creation) || dol_strlen($this->date_creation)==0?'NULL':"'".$this->db->idate($this->date_creation)."'").',';
 		$sql .= ' '.(! isset($this->date_modification) || dol_strlen($this->date_modification)==0?'NULL':"'".$this->db->idate($this->date_modification)."'");
 
@@ -214,6 +222,7 @@ class Website extends CommonObject
 		$sql .= " t.description,";
 		$sql .= " t.status,";
 		$sql .= " t.fk_default_home,";
+		$sql .= " t.virtualhost,";
 		$sql .= " t.date_creation,";
 		$sql .= " t.date_modification,";
 		$sql .= " t.tms";
@@ -237,6 +246,7 @@ class Website extends CommonObject
 				$this->description = $obj->description;
 				$this->status = $obj->status;
 				$this->fk_default_home = $obj->fk_default_home;
+				$this->virtualhost = $obj->virtualhost;
 				$this->date_creation = $this->db->jdate($obj->date_creation);
 				$this->date_modification = $this->db->jdate($obj->date_modification);
 				$this->tms = $this->db->jdate($obj->tms);
@@ -281,7 +291,8 @@ class Website extends CommonObject
 		$sql .= " t.ref,";
 		$sql .= " t.description,";
 		$sql .= " t.status,";
-		$sql .= " t.fk_default_home,"; 
+		$sql .= " t.fk_default_home,";
+		$sql .= " t.virtualhost,";
 		$sql .= " t.date_creation,";
 		$sql .= " t.date_modification,";
 		$sql .= " t.tms";
@@ -321,6 +332,7 @@ class Website extends CommonObject
 				$line->description = $obj->description;
 				$line->status = $obj->status;
 				$line->fk_default_home = $obj->fk_default_home;
+				$line->virtualhost = $obj->virtualhost;
 				$line->date_creation = $this->db->jdate($obj->date_creation);
 				$line->date_modification = $this->db->jdate($obj->date_modification);
 				$line->tms = $this->db->jdate($obj->tms);
@@ -380,6 +392,7 @@ class Website extends CommonObject
 		$sql .= ' description = '.(isset($this->description)?"'".$this->db->escape($this->description)."'":"null").',';
 		$sql .= ' status = '.(isset($this->status)?$this->status:"null").',';
 		$sql .= ' fk_default_home = '.(($this->fk_default_home > 0)?$this->fk_default_home:"null").',';
+		$sql .= ' virtualhost = '.(($this->virtualhost != '')?$this->virtualhost:"null").',';
 		$sql .= ' date_creation = '.(! isset($this->date_creation) || dol_strlen($this->date_creation) != 0 ? "'".$this->db->idate($this->date_creation)."'" : 'null').',';
 		$sql .= ' date_modification = '.(! isset($this->date_modification) || dol_strlen($this->date_modification) != 0 ? "'".$this->db->idate($this->date_modification)."'" : 'null').',';
 		$sql .= ' tms = '.(dol_strlen($this->tms) != 0 ? "'".$this->db->idate($this->tms)."'" : "'".$this->db->idate(dol_now())."'");
@@ -627,6 +640,7 @@ class Website extends CommonObject
 		$this->description = 'A specimen website';
 		$this->status = '';
 		$this->fk_default_home = null;
+		$this->virtualhost = 'http://myvirtualhost';
 		$this->date_creation = dol_now();
 		$this->date_modification = dol_now();
 		$this->tms = dol_now();
@@ -665,6 +679,10 @@ class WebsiteLine
 	 * @var int
 	 */
 	public $fk_default_home;
+	/**
+	 * @var string
+	 */
+	public $virtualhost;
 	/**
 	 * @var mixed
 	 */