how to add html option without value?

how to add html option without value? for example the DISABLED attribute here:

I am not sure if you really need to do this, you could just write:

echo $formField->activeTextField($model,'attribute',array('disabled' => 'disabled');

You then get <input … disabled="disabled" /> which is the correct syntax.

Correct syntax is only "DISABLED" and disabled with value does not validate.

AFAIK it depends on the doctype. xhtml transitional should be ok with that.

I don't think disabled alone will be valid for XHtml.