Onbeforetopic in submit does not change html attribute.

[mrmaniac2416]

$.subscribe('enable', function(event,data) {

document.getElementById('mysel').disabled = false;


});`

i am trying to enable this attribute in my form but it goes as a disabled attribute while submitted .
i m calling this submit button here
<sj:submit value="Save" targets="formResult" indicator="indicator" onCompleteTopics="complete" onBeforeTopics="enable"/>