var xmlHttp
function showstate(ptr)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
if(xmlHttp.readyState==0 || xmlHttp.readyState==4)
  {
	  xmlHttp.open("GET",'get_state_city.php?q='+ptr,true);
  }
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.send(null);

}
function stateChanged() 
{
	xmlHttp.onreadystatechange=function()
 		{
			if (xmlHttp.readyState==4)
				{ 
				   document.getElementById("txtHint1").innerHTML=xmlHttp.responseText;
				}
 		}
}
function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}