diff --git a/include/class/acc_ledger_purchase.class.php b/include/class/acc_ledger_purchase.class.php
index c469499af..6d9c5c62e 100644
--- a/include/class/acc_ledger_purchase.class.php
+++ b/include/class/acc_ledger_purchase.class.php
@@ -1273,7 +1273,7 @@ class  Acc_Ledger_Purchase extends Acc_Ledger
                 // vat label
                 //--
                 $Tva=new ITva_Popup($this->db);
-                $Tva->js="onblur=\"format_number(this);clean_tva($i);compute_ledger($i)\"";
+                $Tva->js="onblur=\"clean_tva($i);compute_ledger($i)\"";
                 $Tva->in_table=true;
                 $Tva->set_attribute('compute',$i);
                 $Tva->set_filter("purchase");
diff --git a/include/class/acc_ledger_sold.class.php b/include/class/acc_ledger_sold.class.php
index ef09d1f8e..d67b10bd8 100644
--- a/include/class/acc_ledger_sold.class.php
+++ b/include/class/acc_ledger_sold.class.php
@@ -1316,7 +1316,7 @@ EOF;
                 $Tva->set_attribute('compute', $i);
                 $Tva->set_filter("sale");
 
-                $Tva->js = 'onblur="format_number(this);clean_tva(' . $i . ');compute_ledger(' . $i . ')"';
+                $Tva->js = 'onblur="clean_tva(' . $i . ');compute_ledger(' . $i . ')"';
                 $Tva->value = $march_tva_id;
                 $array[$i]['tva'] = $Tva->input("e_march$i" . "_tva_id");
                 // vat amount
diff --git a/include/lib/itva_popup.class.php b/include/lib/itva_popup.class.php
index 0076d5f69..4187f669d 100644
--- a/include/lib/itva_popup.class.php
+++ b/include/lib/itva_popup.class.php
@@ -76,7 +76,7 @@ class ITva_Popup extends HtmlInput
     {
         $this->name=($p_name==null)?$this->name:$p_name;
         $this->value=($p_value==null)?$this->value:$p_value;
-        $this->js=(isset($this->js))?$this->js:'onchange="format_number(this);"';
+        $this->js=(isset($this->js))?$this->js:'';
 	$this->id=($this->id=="")?$this->name:$this->id;
 
         if ( $this->readOnly==true) return $this->display();