[jQuery] AJAX Load posting script defined datas

[jQuery] AJAX Load posting script defined datas


I'm a jquery beginer. I want to use the load function in a special
way, the datas should be defined by th sript, depending on which part
of my form I'm posting.
My code is the following :
        $(".form_param").change(function(){
            var param_val = $(this).val();
            var param_nom = $(this).attr("name");
            $("#moniteur").load("session_maj.php", {param_nom: param_val});
        });
The .form_param class is the class of the form elements (select,
checkbox...), and I get the value (param_val) on change, an the name
of the element (param_nom).
I would like to post it, saying something like : {param_nom:
param_val}.
The problème is that in this way, the name of the posted data is
always "param_nom" ; I get $_POST['param_nom']
Is there a way to do what I want in a simple Jquery way ?
Patrick