$.ajax({

    type: "GET",

    url:"ajax_url.php",

    cache: false,

    data:{'action':'ABC','website':'DDD'},

    dataType: "json",

    success:function(data){

        //var resultJson=jQuery.parseJSON(data);

        var resultJson=data;

        if(resultJson.length){

            var website=resultJson.website;

            var servers=resultJson['AAA'].CCC;

        }

    }

});

$.get(

        'ajax_url.php',

        {'action':'AAA','website':'BBB'},

        function(data){

            //....

        }

);