How to retrieve checkboxes values in jQuery

Question

How to use jQuery to get the checked checkboxes values, and put it into a textarea immediately?

Just like this code:

  
  &l         


        

Answer 1

   $(document).ready(function() {
        $(':checkbox').click(function(){
           var cObj = $(this);
           var cVal = cObj.val();
           var tObj = $('#t');
           var tVal = tObj.val();
           if( cObj.attr("checked")) {
              tVal = tVal + "," + cVal; 
              $('#t').attr("value", tVal);
           } else {
              //TODO remove unchecked value.
           }
        });
    });