var xmlHttp;
  function showDates(str) {
    xmlHttp=GetXmlHttpObject();
    if (xmlHttp==null) {
      alert ("Browser does not support HTTP Request");
      return;
    }
    var url="includes/getdates.php";
    url=url+"?q="+str;
    url=url+"&sid="+Math.random();
    xmlHttp.onreadystatechange=stateChanged;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);
  }
  function stateChanged() {
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
      {
        document.getElementById("txtDates").innerHTML=xmlHttp.responseText;
      }
  }
  function GetXmlHttpObject()  {
    var xmlHttp=null;
    try {
      xmlHttp=new XMLHttpRequest();
    }
    catch (e) {
      try {
        xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
      catch (e) {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    }
  return xmlHttp;
  }