html:cancel html:submit

[Fernando Dominguez]

When puss on a cancel boton It works like <html:submit>
I.m ussing the validator plugin so It tries to validate when I puss the cancel buton.

</table>
 </tr>
<tr>
 <td height="18" class="Fondo"></td>
</tr>
<tr>
<td align="right" class="ContPiePopup" height="14">
<c:choose>
<c:when test='${param.update == "yes"}'>
<html:submit property="action" styleClass="btnPie">
<bean:message key="buton.actualizar"/>
</html:submit> 
<html:cancel styleClass="btnPie">              
<bean:message key="buton.cancel"/>
</html:cancel>  
</c:when>
<c:otherwise>
<html:submit property="action" styleClass="btnCp">
<bean:message key="buton.guardar"/>
</html:submit>               
<html:cancel styleClass="btnCp">              
<bean:message key="buton.cancel"/>
</html:cancel>  
</c:otherwise>
</c:choose>
 </td>
 </tr>
</table>
</html:form>  

why?