function GetXmlHttpObject(){

  var xmlHttp=null;
  try
    {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
  catch (e)
    {
    // Internet Explorer
    try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    catch (e)
      {
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    }
  return xmlHttp;
}//ebnd fx

function stateChanged(){

	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")

	{
		document.getElementById("county_cities").innerHTML = xmlHttp.responseText;
	}
}// end fx

function getCityList(checkIt){
	county = document.autoSearchForm.county.value;

	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	  {
	  alert ("Your browser does not support AJAX!");
	  return;
	  }
var url="city_change.php";
url=url+"?county="+county+"&check="+checkIt;

xmlHttp.onreadystatechange=stateChanged;

xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}/// end fx