convert the jquery ajax to native javasctipts

ajaxHandler = {
defaultAttributes: {
type: 'GET',
url: 'index.php/request',
datatype: 'json',
data: {},
success: null,
error: function(data) {
errorHandler.showError('An Error occurred while trying to retreive your requested data, Please try again...');
},
timeout: function() {
errorHandler.showError('The request has been timed out, Please check your Internet connection and try again...');
}
},
sendRequest: function(attributes) {
Paper.giffyLoading.style.display = 'block';
// Program.status('Generating Network Request...');
if (!attributes.nopopup) {
if (attributes.loadmsg) {
Controllers.AnimationController.createProgressBarScreen(attributes.loadmsg);
attributes.loadmsg = null;
}
// else
// Interfaces.AdvancePopup.createModalPopupLoadingDiv();
}
$.ajax(attributes);
}

XMLRequestDefaultHandler = function () {
                        var xmlHttp = new XMLHttpRequest();
                        xmlHttp.open('GET', 'index.php/request', true);
                        xmlHttp.onreadystatechange = function () {
                                if (xmlHttp.readyState === 4 || xmlHttp.status === 200) {

                                } else {
                                        errorHandler.showError('An Error occurred while trying to retreive your requested data, Please try again...');


                                }
                                return;
                        };
                        xmlHttp.send(null);

                }