.attr('checked','checked') does not work

Question

I am trying to check radio. Neither the following works:

[edit]

$(\'selector\').attr(\'checked\',\'checked\');
$(\'selector\').attr(\'checked\',true)         


        

Answer 1

Why not try IS?

$('selector').is(':checked') /* result true or false */

Look a FAQ: jQuery .is() enjoin us ;-)