[web2py] error class proposal

[David]

I was thinking about the form validation.

I thought that it may be useful to include an "error" class on the input 
widget when the form is submitted and has invalid data.

ie.

from

<divclass="w2p_fw">
<inputid="auth_user_password"class="password"type="password"value=""name="password">
<divid="password__error"class="error"style="display: block;">too short</div>
</div>

to

<divclass="w2p_fw">
<inputid="auth_user_password"class="password 
error"type="password"value=""name="password">
<divid="password__error"class="error"style="display: block;">too short</div>
</div>

Notice the error is the class of the input.

I think this would be very useful and don't think it would break any 
backwards compatibility.


Thanks.