var checker =null;
var eminfo = null;
var emwindow = null;

function checkForEmergency()
{
  checker = getHTTPObject();
  var url = DATA_PREFIX + 'task=checkforemergency';
  url = url + '&anticache='+Math.random();
  checker.open('GET', url, true);  
  checker.onreadystatechange = httpHandleCheck;
  checker.send(null);  
}

function httpHandleCheck()
{
  if (checker.readyState == NORMAL_STATE) 
  {
    var results = eval(checker.responseText);
	if (results && results["active"])
	{
	  eminfo = results["info"];
	  ensureEmergencyWindow();
	} else
	{
	  ensureNoEmergencyWindow();
	}
    window.setTimeout("checkForEmergency()",30000);
    checker = null;    
  }
}

function ensureNoEmergencyWindow()
{
  if (emwindow!=null)
  {
  }  
}


function ensureEmergencyWindow()
{
  if (emwindow==null)
  {
    
  }
  
}



addEvent(window,'load',checkForEmergency);