var http;// = getHTTPObject();
var countryobj;
var stateobj;
var sel_state_name;

function handleHttpResponse_user()
{ 
	if (http.readyState == 4) 
	{	
      	isWorking = false;
    if (http.responseText.indexOf('invalid') == -1) 
		{
			var xmlDocument = http.responseXML;
			var msg = xmlDocument.getElementsByTagName('msg').item(0).firstChild.data;
			var valid = xmlDocument.getElementsByTagName('valid').item(0).firstChild.data;
			
			document.getElementById('div-checkuser').innerHTML=msg;
			
		}
  }	
}
function getUserName(vUserName) 
{
	vUserName=vUserName;
	
   
	var url = ajax_url+"checkuser.php?vUserName="+vUserName;
	
	var isWorking = false;
	if (!isWorking)
	{
		isWorking = true;
		if (window.XMLHttpRequest)
	  	{
	  		http=new XMLHttpRequest()
	  		http.open("GET",url, true);
		  	http.onreadystatechange=handleHttpResponse_user
		  	http.send(null)
	  	}
		// code for IE
		else if (window.ActiveXObject)
	  	{
	  		http=new ActiveXObject("Microsoft.XMLHTTP")
	    	if (http)
	    	{
	    		http.open("GET",url, true);
	    		http.onreadystatechange=handleHttpResponse_state
	    		http.send()
	    	}
	  	}
  	}
}