function valider_quantity_form_eng(theForm) 
  {  
  
		if (theForm.qty.value.length == 0)
		{
			alert("Fields of the quantity are obligatory!");
			theForm.qty.focus();
			return false;
		}  
		if ( !isInteger(theForm.qty.value) )
		{
			alert("The quantity must be numeric!");
			theForm.qty.focus();
			return false;
		}
		if (theForm.qty.value == 0)
		{
			alert("The quantity must be numeric > 0!");
			theForm.qty.focus();
			return false;
		}

    return true;
  }
  
function valider_quantity_form(theForm) 
  {  
  
		if (theForm.qty.value.length == 0)
		{
			alert("Les champs de la quantite sont obligatoires !");
			theForm.qty.focus();
			return false;
		}  
		if ( !isInteger(theForm.qty.value) )
		{
			alert("La quantite doit etre numerique !");
			theForm.qty.focus();
			return false;
		}
		if (theForm.qty.value == 0)
		{
			alert("La quantite doit etre numerique > 0!");
			theForm.qty.focus();
			return false;
		}
		
    return true;
  }