function loadProjects(pID, callbackFunction)
{
    $.ajax({
        url: myURL,
        success: function (dataJS)
        {
            if(typeof callbackFunction == 'function')
            {
                callbackFunction.call(this, dataJS);
            }
        }
    });
}

用法:

loadProjects(pID, function(dataJS)
{
    // do stuff with your dataJS, bear in mind you can call the parameter any name.
});