function changeLang(lang){
  	var httpRequest;
	if (window.XMLHttpRequest) { // Mozilla, Safari, ...
		httpRequest = new XMLHttpRequest();
	} else if (window.ActiveXObject) { // IE
	    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
	}
	httpRequest.onreadystatechange=function()
      {
      if(httpRequest.readyState==4)
        {
        document.getElementById('responsetext').innerHTML=httpRequest.responseText;
		
		location.reload(true);

        }
      }
    httpRequest.open("GET","/lang.php?lang="+lang,true);
    httpRequest.send(null);
}