function ajaxQuery(Url, param, div_id)
  {
  var xmlHttp;
  try
    {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
  catch (e)
    {
    // Internet Explorer
    try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    catch (e)
      {
      try
        {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
      catch (e)
        {
        alert("Tarayıcınız AJAX desteklememektedir!");
        return false;
        }
      }
    }
    xmlHttp.onreadystatechange=function()
      {
		if (xmlHttp.readyState == 1)
		{ 
		document.getElementById(div_id).innerHTML = '<center><img src="images/ajax-loading.gif" border="0" align="absmiddle" /></center>';
		}
		if(xmlHttp.readyState==4)
		{
		document.getElementById(div_id).style.display='block';
		document.getElementById(div_id).innerHTML = xmlHttp.responseText;
		document.getElementById("formContent").style.display='none';
		formContent
		}
      }
    xmlHttp.open("GET",Url + param,true);
    xmlHttp.send(null);
  }