How to call Zoho Recruit "addRecords" API and pass xmldata

How to call Zoho Recruit "addRecords" API and pass xmldata

Can't get the code below to successfully make the API call.  I have Javascript and php to work with. When I make the call to "req.open" I never come back and the next "alert" command never executes.  What happened?  Is this the proper way to make the API call?   A little help please with the code (html,javascript, php ) enabling me to effectively call the API.  Thanks very much once again.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
</head>
<body>
</body>
  <script>
    var req = new XMLHttpRequest()
    req.open('GET', 'https://recruit.zoho.com/ats/private/xml/JobOpenings/addRecords?authtoken=e198b8f4d7f50bf48e98e2b2571e5e77&scope=recruitapi&xmlData=<JobOpenings>
        <row no='1'>
        <FL val='Posting title'>" . $_POST['job_title'] . "</FL>
        <FL val='Client'>" . $_POST['client'] . "</FL>
        <FL val='Assigned recruiter'>" . $_POST['recruiter'] . "</FL>
        <FL val='Client manager'>" . $_POST['manager'] . "</FL>
        <FL val='Job opening status'>" . $_POST['status'] . "</FL>
        <FL val='Number of positions'>" . $_POST['openings'] . "</FL>
        <FL val='Country'>" . $_POST['country'] . "</FL>
        <FL val='Roles and responsibilities'>" . $_POST['roles'] . "</FL>
        </row>
        </JobOpenings>', false); 
    alert("just after open:",req.status);
</script> 
</html>