diff --git a/htdocs/core/actions_extrafields.inc.php b/htdocs/core/actions_extrafields.inc.php
index d5f8ea7c18c..03d724b9bba 100644
--- a/htdocs/core/actions_extrafields.inc.php
+++ b/htdocs/core/actions_extrafields.inc.php
@@ -80,6 +80,13 @@ if ($action == 'add')
         	$mesg[]=$langs->trans("ErrorNoValueForCheckBoxType");
         	$action = 'create';
         }
+        if (GETPOST('type')=='link' && !GETPOST('param'))
+        {
+        	$error++;
+        	$langs->load("errors");
+        	$mesg[]=$langs->trans("ErrorNoValueForLinkType");
+        	$action = 'create';
+        }
         if (GETPOST('type')=='radio' && !GETPOST('param'))
         {
         	$error++;
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 36101e4b081..a316c3cd511 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -3624,6 +3624,7 @@ abstract class CommonObject
                	$attributeType  = $extrafields->attribute_type[$attributeKey];
                	$attributeSize  = $extrafields->attribute_size[$attributeKey];
                	$attributeLabel = $extrafields->attribute_label[$attributeKey];
+               	$attributeParam = $extrafields->attribute_param[$attributeKey];  
                	switch ($attributeType)
                	{
                		case 'int':
@@ -3646,6 +3647,19 @@ abstract class CommonObject
             		case 'datetime':
             			$this->array_options[$key]=$this->db->idate($this->array_options[$key]);
             			break;
+           		case 'link':
+				$param_list=array_keys($attributeParam ['options']);
+				// 0 : ObjectName
+				// 1 : classPath
+				$InfoFieldList = explode(":", $param_list[0]);
+				dol_include_once($InfoFieldList[1]);
+				$object = new $InfoFieldList[0]($this->db);
+				if ($value)
+				{
+					$object->fetch(0,$value);
+					$this->array_options[$key]=$object->id;
+				}
+				break;
                	}
             }
             $this->db->begin();
diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index 7bebeb0b660..361c14319eb 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -6,6 +6,7 @@
  * Copyright (C) 2009-2012 Laurent Destailleur  <eldy@users.sourceforge.net>
  * Copyright (C) 2009-2012 Regis Houssin        <regis.houssin@capnetworks.com>
  * Copyright (C) 2013	   Florian Henry        <forian.henry@open-concept.pro>
+ * Copyright (C) 2015	   Charles-Fr BENKE     <charles.fr@benke.fr>
  *
  * 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
@@ -77,6 +78,7 @@ class ExtraFields
 	'checkbox' => 'ExtrafieldCheckBox',
 	'radio' => 'ExtrafieldRadio',
 	'chkbxlst' => 'ExtrafieldCheckBoxFromList',
+	'link' => 'ExtrafieldLink',
 	);
 
 	/**
@@ -187,6 +189,9 @@ class ExtraFields
 			} elseif (($type=='select') || ($type=='sellist') || ($type=='radio') ||($type=='checkbox') ||($type=='chkbxlst')){
 				$typedb='text';
 				$lengthdb='';
+			} elseif ($type=='link') {
+				$typedb='int';
+				$lengthdb='11';
 			} else {
 				$typedb=$type;
 				$lengthdb=$length;
@@ -404,6 +409,9 @@ class ExtraFields
 			} elseif (($type=='select') || ($type=='sellist') || ($type=='radio') || ($type=='checkbox') || ($type=='chkbxlst')) {
 				$typedb='text';
 				$lengthdb='';
+			} elseif ($type=='link') {
+				$typedb='int';
+				$lengthdb='11';
 			} else {
 				$typedb=$type;
 				$lengthdb=$length;
@@ -1043,6 +1051,19 @@ class ExtraFields
 			}
 			$out .= '</select>';
 		}
+		elseif ($type == 'link')
+		{
+			$out='';
+			$param_list=array_keys($param['options']);
+			// 0 : ObjectName
+			// 1 : classPath
+			$InfoFieldList = explode(":", $param_list[0]);
+			dol_include_once($InfoFieldList[1]);
+			$object = new $InfoFieldList[0]($this->db);
+			$object->fetch($value);
+			$out='<input type="text" class="flat" name="options_'.$key.$keyprefix.'"  size="20" value="'.$object->ref.'" >';
+		
+		}
 		/* Add comments
 		 if ($type == 'date') $out.=' (YYYY-MM-DD)';
 		elseif ($type == 'datetime') $out.=' (YYYY-MM-DD HH:MM:SS)';
@@ -1268,6 +1289,21 @@ class ExtraFields
 			} else
 				dol_syslog(get_class($this) . '::showOutputField error ' . $this->db->lasterror(), LOG_WARNING);
 		}
+		elseif ($type == 'link')
+		{
+			$out='';
+			$param_list=array_keys($params['options']);
+			// 0 : ObjectName
+			// 1 : classPath
+			$InfoFieldList = explode(":", $param_list[0]);
+			dol_include_once($InfoFieldList[1]);
+			$object = new $InfoFieldList[0]($this->db);
+			if ($value)
+			{
+				$object->fetch($value);
+				$value=$object->getNomUrl(3);
+			}
+		}
 		else
 		{
 			$showsize=round($size);
diff --git a/htdocs/core/tpl/admin_extrafields_add.tpl.php b/htdocs/core/tpl/admin_extrafields_add.tpl.php
index 1f61064183b..72eddc012d2 100644
--- a/htdocs/core/tpl/admin_extrafields_add.tpl.php
+++ b/htdocs/core/tpl/admin_extrafields_add.tpl.php
@@ -48,6 +48,7 @@
     		else if (type == 'boolean') { size.val('').attr('disabled','disabled'); unique.attr('disabled','disabled'); jQuery("#value_choice").hide();jQuery("#helpchkbxlst").hide();}
     		else if (type == 'price') { size.val('').attr('disabled','disabled'); unique.attr('disabled','disabled'); jQuery("#value_choice").hide();jQuery("#helpchkbxlst").hide();}
     		else if (type == 'select') { size.val('').attr('disabled','disabled'); unique.attr('disabled','disabled');  jQuery("#value_choice").show();jQuery("#helpselect").show();jQuery("#helpsellist").hide();jQuery("#helpchkbxlst").hide();}
+    		else if (type == 'link') { size.val('').attr('disabled','disabled'); unique.attr('disabled','disabled');  jQuery("#value_choice").show();jQuery("#helpselect").show();jQuery("#helpsellist").hide();}
     		else if (type == 'sellist') { size.val('').attr('disabled','disabled'); unique.attr('disabled','disabled');  jQuery("#value_choice").show();jQuery("#helpselect").hide();jQuery("#helpsellist").show();jQuery("#helpchkbxlst").hide();}
     		else if (type == 'checkbox') { size.val('').attr('disabled','disabled'); unique.attr('disabled','disabled');  jQuery("#value_choice").show();jQuery("#helpselect").show();jQuery("#helpsellist").hide();jQuery("#helpchkbxlst").hide();}
     		else if (type == 'radio') { size.val('').attr('disabled','disabled'); unique.attr('disabled','disabled');  jQuery("#value_choice").show();jQuery("#helpselect").show();jQuery("#helpsellist").hide();jQuery("#helpchkbxlst").hide();}
diff --git a/htdocs/core/tpl/admin_extrafields_edit.tpl.php b/htdocs/core/tpl/admin_extrafields_edit.tpl.php
index 13a6486aa4f..76713be57df 100644
--- a/htdocs/core/tpl/admin_extrafields_edit.tpl.php
+++ b/htdocs/core/tpl/admin_extrafields_edit.tpl.php
@@ -68,7 +68,7 @@ if((($type == 'select') || ($type == 'checkbox') || ($type == 'radio')) && is_ar
 		}
 	}
 }
-elseif (($type== 'sellist') || ($type == 'chkbxlst'))
+elseif (($type== 'sellist') || ($type == 'chkbxlst') || ($type == 'link') )
 {
 	$paramlist=array_keys($param['options']);
 	$param_chain = $paramlist[0];