function cmCreateXMLHTTP(){
  var objXMLHTTP=null;
  if (window.XMLHttpRequest) {
      objXMLHTTP = new XMLHttpRequest();
     
  } else if (window.ActiveXObject) {
      objXMLHTTP = new ActiveXObject("Microsoft.XMLHTTP");
      
  }
  return objXMLHTTP;
 }

 function cmXMLHttpReq(nReqType,strReqOpenUrl,strReqParam,pResponseFunc)
 {
  if( nReqType<0 || nReqType>1)
   return;
  var objXMLHTTP = cmCreateXMLHTTP();
  if (objXMLHTTP!=null)
  {
   function responseProcess()
    {
    if (objXMLHTTP.readyState==4)
    {
     pResponseFunc(objXMLHTTP);
    }

   }
   objXMLHTTP.onreadystatechange = responseProcess;
   if( nReqType==0)
   {
    objXMLHTTP.open("GET",strReqOpenUrl,true);
    objXMLHTTP.send(null);
   }
   else
   {
    objXMLHTTP.open("POST",strReqOpenUrl,true);
    objXMLHTTP.setRequestHeader("content-type","application/x-www-form-urlencoded");
    objXMLHTTP.send(strReqParam);
   }  
  }
 }