$(document).ready(function () {

    var pixelRatio = window.devicePixelRatio;
    var screenWidth = window.screen.width;
    var screenHeight = window.screen.height;

    $.ajax({
        type: "GET",
        url: "/json/tracking-setup.ashx?PixelRatio=" + pixelRatio + "&ScreenWidth=" + screenWidth + "&ScreenHeight=" + screenHeight+ "&Random=0"
    });


});