[jQuery] ArgumentOutOfRange Exception

[Rachael]

Hi, All

I use jquery 1.2.6 in one of my projects and it will call some
webmethods without arguments. it works properly in my dev machine.
However, ArgumentOutOfRange Exception (parameter: length) will be
thrown after deployment. Any idea? Thanks in advance.

Snippet like:
$.ajax({
    type: "POST",
    url: "Mywebpage/Mywebmethod",
    data: "{}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(result) {
          ....
    }
  });