function checkRMAStatus() {
  var values = [
    "rma="    + encodeURIComponent(document.getElementsByName("rmanum")[0].value),
    "serial=" + encodeURIComponent(document.getElementsByName("serial")[0].value)
  ];

  document.getElementById('rmaform').style.display = "none";
  document.getElementById('rmacheck').style.display = "block";

  // Send the AJAX request
  var http = getHTTPObject();
  http.open("GET", "/includes/ajax/rma.status.check.php?" + values.join("&"), true);
  http.onreadystatechange = function() {
    if (http.readyState == 4) {
      var rmaresult = document.getElementById('rmaresult');
      rmaresult.getElementsByTagName('div')[0].firstChild.nodeValue = http.responseText;
      rmaresult.parentNode.reset();

      document.getElementById('rmacheck').style.display = "none";
      rmaresult.style.display = "block";
    }
  };
  http.send(null);
}

function resetRMAForm() {
  document.getElementById('rmaresult').style.display = "none";
  document.getElementById('rmaform').style.display = "block";
}