function GetXHR()
{
if (window.XMLHttpRequest)
  {// code for Firefox, Opera, IE7, etc.
  xhr=new XMLHttpRequest();

  }
else if (window.ActiveXObject)
  {// code for IE6, IE5
  xhr=new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (xhr==null)

  {
     alert("Tarayiciniz AJAX (XMLHTTP) yapilarini desteklemiyor!");
     return null;
  }
  return xhr;
}

function MakeRequest(url, target)
{
  var xmlReq = GetXHR();
var divId = target;
var urlStr = url;

xmlReq.onreadystatechange=function() {
if (xmlReq .readyState==4)
  {// 4 = "loaded"
  if (xmlReq .status==200)
    {// 200 = "OK"
            document.getElementById(divId).innerHTML=xmlReq.responseText;
    }
  else
    {
    alert("Problem retrieving data(problem var hata kodu):" + xmlReq.statusText);
    }
  }
};
xmlReq.open("GET",urlStr ,true);
xmlReq.send(null);
// <a href="JavaScript:MakeRequest('file.html', 'div_id')">Text</a>
}