// JavaScript Document

var xmlHttp

function showUser(str)
 { 
 xmlHttp=GetXmlHttpObject()
 if (xmlHttp==null)
  {
  alert ("Browser does not support HTTP Request")
  return
  } 
 var url="ajax.php"
 url=url+"?countrycode="+str
 url=url+"&sid="+Math.random()
 xmlHttp.onreadystatechange=stateChanged 
 xmlHttp.open("GET",url,true)
 xmlHttp.send(null)
 }

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{

 xmlDoc=xmlHttp.responseXML;
 
 //clear select box
 document.forms['demoform'].city_id.options.length = 0;
 
 $i = 0;
for($i; $i<xmlDoc.getElementsByTagName("name").length; $i++) {
	
document.forms['demoform'].city_id.options[$i] = new Option(xmlDoc.getElementsByTagName("name")[$i].childNodes[0].nodeValue,xmlDoc.getElementsByTagName("city_id")[$i].childNodes[0].nodeValue);

}

document.getElementById('submit').disabled = false;

}
} 

function GetXmlHttpObject()
 { 
 var objXMLHttp=null
 if (window.XMLHttpRequest)
  {
  objXMLHttp=new XMLHttpRequest()
  }
 else if (window.ActiveXObject)
  {
  objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
  }
 return objXMLHttp
 }