Thank u very much Miss Harper. I think it's due to this code, and I don't really know a good way to rectify this :
Jour
<html:select size="1" property="birthDay">
<c:forEach var="aDay" begin="1" end="31">
<option value="${aDay}"/>
<c:out value="${aDay}"/>
</c:forEach>
</html:select>
Mois
<html:select size="1" property="birthMonth">
<c:forEach var="aMonth" begin="1" end="12">
<option value="${aMonth}"/>
<c:out value="${aMonth}"/>
</c:forEach>
</html:select>
Thank u very much for your support.
