How do I write a jquery function that accepts a callback as a parameter

I Have the following function.

function ChangeDasPanel(controllerPath, postParams) {

    $.post(controllerPath, postParams, function(returnValue) {

        $('#DasSpace').hide("slide", { direction: "right" }, 1000, function() {

            $('#DasSpace').contents().remove();

            $('#DasSpace').append(returnValue).css("display", "block");

            $('#DasSpace').show("slide", { direction: "right" }, 1000);

        });

    });

};

But I want to be able to call it like this

ChangeDasPanel("../Home/Test", {} ,function (){
  //do some stuff on callback
}

How can I implement support for callbacks in my function?