Zend FR

    $filter = new Zend_Filter_LocalizedToNormalized(array('precision' => 2));
        
        $i = 0.00;
        
         // Champ texte "montant du rachat" 
        $montantrachat = new Zend_Form_Element_Text('montantrachat');
    
    $montantrachat->setValue($i);
        $montantrachat->addFilter($filter);
       
    $montantrachat->setDecorators($elementdecorators);
        $montantrachat->setLabel("Montant Rachat :");  
        $this->addElement($montantrachat);