$.ajax({
            url : url,
            type: "POST",
            data: {'keywoard':'test'},
            contentType: "application/json",
            dataType: "json",
            success:function(data, textStatus, jqXHR)
            {
                alert("done")
            },
            error: function(jqXHR, textStatus, errorThrown)
            {
                alert("Error!");
            }
        });