web page is disabled or not

web page is disabled or not

Hi,
 How do we test the web page is disabled or not.i my application there is a  dependency from section to section.once if uncheck the question the entire page should go disable.how to test this page gone to disabled mode using jquery.
Ex:document.getElementById('AppForm').getElementsByTagName('TABLE')[6].getElementsByTagName('TBODY')[0].getElementsByTagName('TR')[0].getElementsByTagName('TD')[11].getElementsByTagName('TABLE')[1];

cheers..