//http://daniel.lorch.cc/docs/ajax_simple/
    var http = false;

    if(navigator.appName == "Microsoft Internet Explorer") {
      http = new ActiveXObject("Microsoft.XMLHTTP");
    } else {
       http = new XMLHttpRequest();
    }
    function makeCall(telephoneNumber) {
      var callMeNumber = document.getElementById('callMeNumber').value;
      var callMeName = document.getElementById('callMeName').value;
      var elem = document.getElementById('callMeDiv');
      elem.className = 'callbackdivblank';
      elem.innerHTML = '<img src=images/busy.gif valign=top> Please wait...';
      http.open("GET", "ajaxcallme.asp?callMeNumber=" + callMeNumber + "&callMeName=" + callMeName, true);
      http.onreadystatechange=function() {
        if(http.readyState == 4) {
          elem.innerHTML = http.responseText;
         }
      }
      http.send(null);
    }