function createXmlHttpRequestObject(){
  var xmlHttp;
  try{
	xmlHttp=new XMLHttpRequest();
  }catch(e){
	var XmlHttpVersions=new Array("MSXML2.XMLHTTP.6.0.",
								   "MSXML2.XMLHTTP.5.0",
								   "MSXML2.XMLHTTP.4.0",
								   "MSXML2.XMLHTTP.3.0",
								   "MSXML2.XMLHTTP",
								   "Microsoft.XMLHTTP");
    for(var i=0;i<XmlHttpVersions.length && !xmlHttp;i++){
	  try{
	    xmlHttp=new ActiveXObject(XmlHttpVersions[i]);
	  }catch(e){}
	}
  }
  if(xmlHttp){
	return xmlHttp;
  }
}