function Inint_AJAX() {
   try { return new ActiveXObject("Msxml2.XMLHTTP");  } catch(e) {} //IE
   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {} //IE
   try { return new XMLHttpRequest();          } catch(e) {} //Native Javascript
   alert("XMLHttpRequest not supported");
   return null;
};

function dorez(src, val, valA) {
     var req = Inint_AJAX();
     req.onreadystatechange = function () { 
          if (req.readyState==4) {
               if (req.status==200) {
                    document.getElementById(''+src+'').innerHTML=req.responseText; //return value
               } 
          }
     };
    req.open("GET", "ajax.php?data="+src+"&val="+val+"&valA="+valA); //make connection
    req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=iso-8859-1"); // set Header
    req.setRequestHeader('X-Referer', document.location);
	req.send(null); //send value
}