var myRequest = null;
function CreateXmlHttpReq(handler) {
  var agt = navigator.userAgent.toLowerCase();
  var is_ie5 = (agt.indexOf('msie 5') != -1);
  var xmlhttp = null;
  try {
    xmlhttp = new XMLHttpRequest();
    try {
        // Fix for some version of Mozilla browser.
        http_request.overrideMimeType('text/xml');
    } catch(e) { }
    xmlhttp.onload = handler;
    xmlhttp.onerror = handler;
  } catch(e) {
    var control = (is_ie5) ? "Microsoft.XMLHTTP" : "Msxml2.XMLHTTP";
    xmlhttp = new ActiveXObject(control);
    xmlhttp.onreadystatechange = handler;
  }
  return xmlhttp;
}

function myHandler2() {

    if (myRequest.readyState == 4 && myRequest.status == 200) {
        e = document.getElementById("note");
		e.innerHTML = myRequest.responseText;
    }  
	
}

function check() {
    
    var r = Math.random();
    myRequest = CreateXmlHttpReq(myHandler2);
	myRequest.open("GET","test_note.php?rand="+escape(r));
    myRequest.send(null);
}