How can I pass parameters using JSON, Ajax and JSP?

How can I pass parameters using JSON, Ajax and JSP?

Hi, I'm trying to use JSON to get some values from a database using Ajax, I'm working with JSP, this is what I'm doing:

  2.             $.ajax({
  3.                 type: "POST",
  4.                 url: "cutDateEvents.jsp",
  5.                 //data: "{cCardDropDown: document.getElementById('cCardDropDown').value, selection: 'FCDT'}",
  6.                 success: function(data){
  7.                      var output = $.parseJSON(data);
  8.                      $("#cutDateTable").append(output.table);
  9.                      alert(output.table);
  10.                      alert(output.dropDown);
  11.                 }
  12.             }); 

I'm sending two values, one which is a select value and the other a static string value, if I comment that line, it works with no problem, but if I don't nothing happens, I guess it's giving me an error but I can't see it in the Chrome debugger, nothing shows up, any help? thank you!!