Jquery Ajax Call With & Without Json

Jquery Ajax Call

var str = $('#loginform').serialize();

$.ajax({

type: 'POST',

url: "../Sessions/AttemptSenderLogin?txtEmail=" + $("#txtEmail").val() + "&txtPassword=" + $("#txtPassword").val(),

data: str,

success: function(data) {

},

error: function(res) {

}

});

Jquery Ajax Call  With JsonType

$.ajax({

type: "GET",

url: "/AdminTransactions/GetThreatMetrixDeviceIdDetails",

data: "deviceId=" + $('#HdnDeviceId').val() + "&transId=" + $('#HdnTransaciontId').val(),

dataType: 'json',

error: function () {

},

success: function (data) {

if (data != '') {

$.each(data, function (index, item) {

//item.ProcessingFee // Get Json Values

});

}

}

});