function ajax_GetXmlHttpObject_Old(){
  var objXMLHttp=null
  if (window.XMLHttpRequest){
    objXMLHttp=new XMLHttpRequest()
  }else if (window.ActiveXObject){
    objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
  }
  return objXMLHttp
}
function ajax_GetXmlHttpObject(){
	var ajaxRequest;  // The variable that makes Ajax possible!
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Browser does not support HTTP Request");
				return false;
			}
		}
	}
	return ajaxRequest;
}
function ajax_getData(url,target){

  var xmlHttp=null;
  xmlHttp=ajax_GetXmlHttpObject();
  if (xmlHttp==null){
    alert ("Browser does not support HTTP Request")
    return ""
  }
  xmlHttp.onreadystatechange=function(){ajax_stateChanged(xmlHttp,target)};
  xmlHttp.open("GET",url,true);
  xmlHttp.send(null);
}
function ajax_stateChanged(xmlHttp,target) {
  switch (xmlHttp.readyState){
    case 1:
      document.getElementById(target).innerHTML="loading data, please wait...";
      break;
    case 2:
      document.getElementById(target).innerHTML="data retrieved...";
      break;
    case 4:
        // only if "OK"
        if (xmlHttp.status == 200) {
            results = xmlHttp.responseText;
            document.getElementById(target).innerHTML = results;
        } else {
            document.getElementById(target).innerHTML="error:\n" + xmlHttp.statusText;
        }
      break;
    default:
      //document.getElementById(target).innerHTML="no data retrieved";
  }
}