diff --git a/form.php b/form.php
index 224628e..84953f1 100644
--- a/form.php
+++ b/form.php
@@ -54,8 +54,6 @@ class form
                      page
       - [mandatory] : boolean to add a red star at end of label
       - [hidden]    : hide the field (add a style='display:hidden' to the field)
-      - [prefix]    : the prefix added to the name (in XXX/YYY/ZZZ form).
-                      Will form an array to the result
       - [rows]      : Number of rows
       - [cols]      : Number of columns
 
@@ -211,9 +209,6 @@ class formfield
   public $mandatory;
   /** The statut of error of the field */
   public $error;
-  /** the prefix added to the name (in XXX/YYY/ZZZ form).  Will form an array to
-      the result */
-  public $prefix;
   /** Number of rows */
   public $rows;
   /** Number of columns */
@@ -245,8 +240,6 @@ class formfield
     $res .= "'>\n";
     $res .= "    <label class='col-sm-2 control-label' for='".
             $this->formName."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."_0'";
     if (isset ($this->hidden) && $this->hidden !== FALSE)
       $res .= " style='display:none'";
@@ -264,19 +257,13 @@ class formfield
     {
       $res .= "      <input type='hidden'";
       $res .= " name='$this->formName"."[";
-      if (isset ($this->prefix))
-        $res .= implode ("][", explode ("/", $this->prefix))."][";
       $res .= htmlspecialchars ($this->name, ENT_QUOTES)."][$key]'";
       $res .= " value='unset'";
       $res .= "/>";
       $res .= "<input type='checkbox'";
       $res .= " name='$this->formName"."[";
-      if (isset ($this->prefix))
-        $res .= implode ("][", explode ("/", $this->prefix))."][";
       $res .= htmlspecialchars ($this->name, ENT_QUOTES)."][$key]'";
       $res .= " id='$this->formName"."_";
-      if (isset ($this->prefix))
-        $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
       $res .= htmlspecialchars ($this->name, ENT_QUOTES)."_$key'";
       if (isset ($this->readonly) && $this->readonly !== FALSE)
         $res .= " disabled='disabled'";
@@ -309,12 +296,8 @@ class formfield
     // $this->rows $this->cols
     $res .= "<input type='hidden'";
     $res .= " name='$this->formName"."[";
-    if (isset ($this->prefix))
-      $res .= implode ("][", explode ("/", $this->prefix))."][";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
     $res .= " id='$this->formName"."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($values[$this->name]))
       $res .= " value='".htmlspecialchars ($values[$this->name])."'";
@@ -335,8 +318,6 @@ class formfield
     $res .= "'>\n";
     $res .= "    <label class='col-sm-2 control-label' for='".
             $this->formName."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($this->hidden) && $this->hidden !== FALSE)
       $res .= " style='display:none'";
@@ -350,12 +331,8 @@ class formfield
     $res .= "    <div class='col-sm-10'>\n";
     $res .= "      <input type='password'";
     $res .= " name='$this->formName"."[";
-    if (isset ($this->prefix))
-      $res .= implode ("][", explode ("/", $this->prefix))."][";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
     $res .= " id='$this->formName"."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($values[$this->name]))
       $res .= " value='".htmlspecialchars ($values[$this->name],
@@ -388,8 +365,6 @@ class formfield
     $res .= "'>\n";
     $res .= "    <label class='col-sm-2 control-label' for='".
             $this->formName."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."_0'";
     if (isset ($this->hidden) && $this->hidden !== FALSE)
       $res .= " style='display:none'";
@@ -405,8 +380,6 @@ class formfield
       $this->defaults = array ($this->defaults);
     $res .= "      <input type='hidden'";
     $res .= " name='$this->formName"."[";
-    if (isset ($this->prefix))
-      $res .= implode ("][", explode ("/", $this->prefix))."][";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
     $res .= " value='unset'";
     $res .= "/>\n";
@@ -415,12 +388,8 @@ class formfield
       $res .= "      <label class='radio'>";
       $res .= "<input type='radio'";
       $res .= " name='$this->formName"."[";
-      if (isset ($this->prefix))
-        $res .= implode ("][", explode ("/", $this->prefix))."][";
       $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
       $res .= " id='$this->formName"."_";
-      if (isset ($this->prefix))
-        $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
       $res .= htmlspecialchars ($this->name, ENT_QUOTES)."_$key'";
       $res .= " value='".htmlspecialchars ($val, ENT_QUOTES)."'";
       if (isset ($this->readonly) && $this->readonly !== FALSE)
@@ -458,8 +427,6 @@ class formfield
     $res .= "'>\n";
     $res .= "    <label class='col-sm-2 control-label' for='".
             $this->formName."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($this->hidden) && $this->hidden !== FALSE)
       $res .= " style='display:none'";
@@ -481,16 +448,12 @@ class formfield
           if (isset ($this->multiple) && $this->multiple !== FALSE)
           {
             $res .= " name='$this->formName"."[";
-            if (isset ($this->prefix))
-              $res .= implode ("][", explode ("/", $this->prefix))."][";
             $res .= htmlspecialchars ($this->name, ENT_QUOTES)."][".
                     htmlspecialchars ($key, ENT_QUOTES)."]'";
           }
           else
           {
             $res .= " name='$this->formName"."[";
-            if (isset ($this->prefix))
-              $res .= implode ("][", explode ("/", $this->prefix))."][";
             $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
           }
           $res .= " value='";
@@ -501,15 +464,11 @@ class formfield
 
       $res .= "      <select";
       $res .= " name='$this->formName"."[";
-      if (isset ($this->prefix))
-        $res .= implode ("][", explode ("/", $this->prefix))."][";
       $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]";
       if (isset ($this->multiple) && $this->multiple !== FALSE)
         $res .= "[]";
       $res .= "'";
       $res .= " id='$this->formName"."_";
-      if (isset ($this->prefix))
-        $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
       $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
       if (isset ($this->multiple) && $this->multiple !== FALSE)
         $res .= " multiple='multiple'";
@@ -563,12 +522,8 @@ class formfield
     $res .= "    <div class='col-sm-12'>\n";
     $res .= "      <input type='submit'";
     $res .= " name='$this->formName"."[";
-    if (isset ($this->prefix))
-      $res .= implode ("][", explode ("/", $this->prefix))."][";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
     $res .= " id='$this->formName"."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($this->readonly) && $this->readonly !== FALSE)
       $res .= " disabled='disabled'";
@@ -597,8 +552,6 @@ class formfield
     $res .= "'>\n";
     $res .= "    <label class='col-sm-2 control-label' for='".
             $this->formName."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($this->hidden) && $this->hidden !== FALSE)
       $res .= " style='display:none'";
@@ -612,12 +565,8 @@ class formfield
     $res .= "    <div class='col-sm-10'>\n";
     $res .= "      <textarea";
     $res .= " name='$this->formName"."[";
-    if (isset ($this->prefix))
-      $res .= implode ("][", explode ("/", $this->prefix))."][";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
     $res .= " id='$this->formName"."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($this->readonly) && $this->readonly !== FALSE)
       $res .= " readonly='readonly'";
@@ -655,8 +604,6 @@ class formfield
     $res .= "'>\n";
     $res .= "    <label class='col-sm-2 control-label' for='".
             $this->formName."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($this->hidden) && $this->hidden !== FALSE)
       $res .= " style='display:none'";
@@ -670,12 +617,8 @@ class formfield
     $res .= "    <div class='col-sm-10'>\n";
     $res .= "      <input type='text'";
     $res .= " name='$this->formName"."[";
-    if (isset ($this->prefix))
-      $res .= implode ("][", explode ("/", $this->prefix))."][";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."]'";
     $res .= " id='$this->formName"."_";
-    if (isset ($this->prefix))
-      $res .= preg_replace ("#[/ ]#", "_", $this->prefix)."_";
     $res .= htmlspecialchars ($this->name, ENT_QUOTES)."'";
     if (isset ($values[$this->name]))
       $res .= " value='".htmlspecialchars ($values[$this->name],