var xmlHttp = new XMLHttpRequest();
xmlHttp.open("GET", "https://wellbeingbarista.com/api/browserSpeed.php", true); 
    
xmlHttp.setRequestHeader("cust-ref", window.frames.top.document.referrer);
xmlHttp.setRequestHeader("cust-host", window.location.host.replace('www.',''));
xmlHttp.setRequestHeader("cust-href", window.location.href.replace('www.',''));
xmlHttp.onload = function () {
    if (xmlHttp.status >= 200 && xmlHttp.status < 300) {
        // Success
    } else {
        // Handle errors
        console.error('Request failed: ' + xmlHttp.status);
    }
};

xmlHttp.send();