Question

I have a textbox, which upon a change in text, calls some Javascript.

Before this textbox, I have 2 checkboxes (chkA, chkB) which are mutually exclusive.
When I start my new function I want to be able to check which checkbox is currently selected. So far I have this,

   $(".textbox1").keyup(function () {
                var chk = $(this).prevAll(":checked").first().attr('class');  ....

    });

The code goes on to do a “If class = blah, then do something, else, do nothing”

it worked for my radio button code, but not my checkboxes. “chk” ends up being null.

Answer 1

If you need to know the class of a checked checkbox (i used an imaginary element that i called “wrapper” which holds all your input fields, substitute that with the correct element or post your markup):

$(".textbox1").keyup(function () {
       if($(this).closest('#wrapper').find("input:checkbox:checked").hasClass('blah')){
          //do what you need

});