diff --git a/html/fid.php b/html/fid.php
index 005b11d30..814a28376 100644
--- a/html/fid.php
+++ b/html/fid.php
@@ -125,14 +125,15 @@ if ( isset($_SESSION['isValid']) && $_SESSION['isValid'] == 1)
 
 
     $name=$array[0]['vw_name'];
-    $sell=$array[0]['vw_sell'] ;
-    $buy=$array[0]['vw_buy'];
+    $sell=(isNumber($array[0]['vw_sell']) == 1) ? $array[0]['vw_sell'] : 0 ;
+    $buy=(isNumber($array[0]['vw_buy']) == 1) ?$array[0]['vw_buy']:0;
+    
     $tva_id=$array[0]['tva_id'];
 
     // Check null
     $name=($name==null)?" ":str_replace('"','',$name);
-    $sell=($sell==null)?" ":str_replace('"','',$sell);
-    $buy=($buy==null)?" ":str_replace('"','',$buy);
+    $sell=($sell==null)?"0":str_replace('"','',$sell);
+    $buy=($buy==null)?"0":str_replace('"','',$buy);
     $tva_id=($tva_id==null)?" ":str_replace('"','',$tva_id);
     /* store the answer in an array and transform it later into a JSON object */
     $tmp=array();
diff --git a/include/ajax/ajax_card.php b/include/ajax/ajax_card.php
index cfc471618..5c291bc13 100644
--- a/include/ajax/ajax_card.php
+++ b/include/ajax/ajax_card.php
@@ -433,12 +433,17 @@ case 'fs':
 
         /* if it is a ledger of sales we use vw_buy
            if it is a ledger of purchase we use vw_sell*/
-        if ( $type=="ACH" )
+        
+        if ( $type=="ACH" ){
+            $amount=(isNumber($a[$i]['vw_buy']) == 1 )?$a[$i]['vw_buy']:0;
             $array[$i]['javascript'].=sprintf("set_value('%s','%s');",
-                                              $price,$a[$i]['vw_buy']);
-        if ( $type=="VEN" )
+                                              $price,$amount);
+        }
+        if ( $type=="VEN" ){
+            $amount=(isNumber($a[$i]['vw_buy']) == 1 )?$a[$i]['vw_sell']:0;
             $array[$i]['javascript'].=sprintf("set_value('%s','%s');",
-                                              $price,$a[$i]['vw_sell']);
+                                              $price,$amount);
+        }
         $array[$i]['javascript'].=sprintf("set_value('%s','%s');",
                                           $tvaid,$a[$i]['tva_id']);
         $array[$i]['javascript'].="removeDiv('search_card');";
diff --git a/include/class/acc_ledger_purchase.class.php b/include/class/acc_ledger_purchase.class.php
index 1aada131c..c469499af 100644
--- a/include/class/acc_ledger_purchase.class.php
+++ b/include/class/acc_ledger_purchase.class.php
@@ -1265,7 +1265,7 @@ class  Acc_Ledger_Purchase extends Acc_Ledger
             $Price=new INum();
             $Price->setReadOnly(false);
             $Price->size=9;
-            $Price->javascript="onBlur='format_number(this,4);clean_tva($i);compute_ledger($i)'";
+            $Price->javascript="onblur=\"format_number(this,4);clean_tva($i);compute_ledger($i)\"";
             $array[$i]['pu']=$Price->input("e_march".$i."_price",$march_price);
             if ( $g_parameter->MY_TVA_USE=='Y')
             {
@@ -1273,7 +1273,7 @@ class  Acc_Ledger_Purchase extends Acc_Ledger
                 // vat label
                 //--
                 $Tva=new ITva_Popup($this->db);
-                $Tva->js="onblur=\"format_number(this);onChange=clean_tva($i);compute_ledger($i)\"";
+                $Tva->js="onblur=\"format_number(this);clean_tva($i);compute_ledger($i)\"";
                 $Tva->in_table=true;
                 $Tva->set_attribute('compute',$i);
                 $Tva->set_filter("purchase");
@@ -1286,7 +1286,7 @@ class  Acc_Ledger_Purchase extends Acc_Ledger
                 $Tva_amount=new INum();
                 $Tva_amount->setReadOnly(false);
                 $Tva_amount->size=9;
-                $Tva_amount->javascript="onBlur='format_number(this);compute_ledger($i)'";
+                $Tva_amount->javascript="onblur=\"format_number(this);compute_ledger($i)\"";
                 $array[$i]['amount_tva']=$Tva_amount->input("e_march".$i."_tva_amount",$march_tva_amount);
             }
             // quantity
@@ -1296,7 +1296,7 @@ class  Acc_Ledger_Purchase extends Acc_Ledger
             $Quantity=new INum();
             $Quantity->setReadOnly(false);
             $Quantity->size=9;
-            $Quantity->javascript="onChange=format_number(this);clean_tva($i);compute_ledger($i)";
+            $Quantity->javascript="onchange=\"format_number(this);clean_tva($i);compute_ledger($i)\"";
             $array[$i]['quantity']=$Quantity->input("e_quant".$i,$quant);
 
         }
diff --git a/include/class/acc_ledger_sold.class.php b/include/class/acc_ledger_sold.class.php
index 8a6ff3e7b..ef09d1f8e 100644
--- a/include/class/acc_ledger_sold.class.php
+++ b/include/class/acc_ledger_sold.class.php
@@ -1303,7 +1303,7 @@ EOF;
             $Price = new INum();
             $Price->setReadOnly(false);
             $Price->size = 9;
-            $Price->javascript = "onBlur='format_number(this,4);clean_tva($i);compute_ledger($i)'";
+            $Price->javascript = "onblur=\"format_number(this,4);clean_tva($i);compute_ledger($i)\"";
             $array[$i]['pu'] = $Price->input("e_march" . $i . "_price", $march_price);
             $array[$i]['tva'] = '';
             $array[$i]['amount_tva'] = '';
@@ -1324,7 +1324,7 @@ EOF;
                 $wTva_amount = new INum();
                 $wTva_amount->readOnly = false;
                 $wTva_amount->size = 6;
-                $wTva_amount->javascript = "onBlur='format_number(this);compute_ledger($i)'";
+                $wTva_amount->javascript = "onblur='format_number(this);compute_ledger($i)'";
                 $array[$i]['amount_tva'] = $wTva_amount->input("e_march" . $i . "_tva_amount", $march_tva_amount);
             }
             // quantity
@@ -1334,7 +1334,7 @@ EOF;
             $Quantity = new INum();
             $Quantity->setReadOnly(false);
             $Quantity->size = 8;
-            $Quantity->javascript = "onChange='format_number(this);clean_tva($i);compute_ledger($i)'";
+            $Quantity->javascript = "onchange='format_number(this);clean_tva($i);compute_ledger($i)'";
             $array[$i]['quantity'] = $Quantity->input("e_quant" . $i, $quant);
         }// foreach article
         $f_type = _('Client');