function createHttpRequest() 
{
  if (window.XMLHttpRequest) 
  {
    try { return new XMLHttpRequest(); } catch (e){}
  } 
  else if (window.ActiveXObject) 
  {
    try { return new ActiveXObject('Msxml2.XMLHTTP'); } catch (e){}
    try { return new ActiveXObject('Microsoft.XMLHTTP'); } catch (e){}
  }
  return null;
}

function setPlay()
{
	var req = createHttpRequest();
	window.onbeforeunload = function(evt) 
	{
		var req = createHttpRequest();
		req.open('GET', 'http://' + document.location.host + '/admin/click/summon_click_full.php?type=0', true);
		req.send(null);
		
		evt = evt || window.event;
		evt.returnValue = "Вы уверены, что хотите закрыть окно? Радио будет остановлено!";
	}
	req.open('GET', 'http://' + document.location.host + '/admin/click/summon_click_full.php?type=1', true);
	req.send(null);
}

function setStop()
{
	window.onbeforeunload = null;
	
	var req = createHttpRequest();
	
	req.open('GET', 'http://' + document.location.host + '/admin/click/summon_click_full.php?type=0', true);
	req.send(null);
}