Open a hidden div when checkbox is checked

Open a hidden div when checkbox is checked

I am trying to open a new window (hidden div) when a checkbox is checked.  Right now the way i have it is it is opening when the checkbox is clicked instead of checked.  I have been trying to figure it out for a few hours now and just hoping somebody can help a jquery newbie. 

Here is my code in case someone wants to take a look.

    $(document).ready(function() {
      $('#imgFiche')
            //    ($(this).attr('checked')){       
        .attr('target', '_blank')
                .click(function(e){
                    e.preventDefault();
            $.nyroModalManual({
                width: 466,
                height: 414,
                cssOpt:{wrapper2:{overflow:'hidden'}},
                url: $(this).attr('open')
            });
                       
            return false;
        })
                //}
    });