function createREQ(){    
	    try {
     req = new XMLHttpRequest(); /* e.g. Firefox */
     } catch(e) {
       try {
       req = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */
       } catch (e) {
         try {
         req = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */
         } catch (E) {
          req = false;
         } 
       } 
     }
 				return req;
  }
function requestGET(url, query, req)
{
	randNo = parseInt(Math.random()*99999999);
	req.open("GET",url+'?'+query+'&rand='+randNo,true);
	req.send(null);
}

function requestPOST(url, query, req)
{
	req.open("POST",url,true);
	req.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
	req.send(query);
}

function doCallback(callback, item)
{
	eval(callback + '(item)');
}

function doAjax(url, query, callback, reqtype, getxml) {
   var myreq = createREQ();
	 myreq.onreadystatechange = function() {
   if(myreq.readyState == 4) {
      if(myreq.status == 200) {
         var item = myreq.responseText;
				 if(getxml==1){
				 	item = myreq.responseXML;
				 }
				 doCallback(callback, item);
         }
      }
	 }
	 if(reqtype=='post'){
	 	requestPOST(url, query, myreq);
	 }
	 else{
	 	requestGET(url, query, myreq);
	 }
}