How to call WebMethod from cross domain

Question

I want to call a WebMethod in my application hosted on different server and url, but fails every time.

My code is :

 

$.ajax({

url: 'http://xyz.com/ATAServices/ServicePage.asmx?CallWebServiceUsingJson',

type: "GET",

crossDomain: true,

async: false,

data: JSON.stringify({ UserName: $('#txtUserName').val(), UserPassword: $('#txtUserPasssword').val(), SiteName: '1' }),

dataType: 'json',

contentType: "application/json; charset=utf-8",

success: function (data) {

 },

 error: function (ts) {

 alert(ts.responseText)

 }

 });

 

Please help me to use Cross Domain webmethod