var xmlHttp
//khoi tao doi tuong xmlHTTP
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;
}
var timegetphoto;
function ChangeLanguage(str)
{
	clearTimeout(timegetphoto);
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	 {
	 alert ("Browser does not support HTTP Request");
	 return;
	 } 
	var url="index.php?opt=lang&lang="+str;
	xmlHttp.onreadystatechange=stateChanged_ChangLanguage;
	xmlHttp.open("GET",url,true) ;
	xmlHttp.send(null);
}
function stateChanged_ChangLanguage()
{
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		window.location.replace('/index.php?opt=main/');
	} 
}