function sendRequest(url, callback, postData)
{
	var req = createXMLHTTPObject();
	if (!req) return;
	var method = (postData) ? "POST" : "GET";
	req.open(method, url, true);
//	req.setRequestHeader('User-Agent', 'XMLHTTP/1.0');
	if (postData)
	{
		req.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
	}
  
	req.onreadystatechange = function () 
	{
    		if (req.readyState != 4) return;
    		if (req.status != 200 && req.status != 304)
		{
			
      			callback(req);
				return;
    		}
    		callback(req);
  	}
  	
	if (req.readyState == 4)
	{
		return;
	}
  	req.send(postData);
}

var XMLHttpFactories =
[
  function () {return new XMLHttpRequest()}, 
  function () {return new ActiveXObject("Msxml2.XMLHTTP")}, 
  function () {return new ActiveXObject("Msxml3.XMLHTTP")}, 
  function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject()
{
	var xmlhttp = false;
	for (var i=0;i<XMLHttpFactories.length;i++)
	{
		try
		{
			xmlhttp = XMLHttpFactories[i]();
		}

		catch (e)
		{
			continue;
    		}
    		break;
  	}
  	return xmlhttp;
}

function clearSelection()
{
	var selection = null;
	if(window.getSelection)
	{
		selection = window.getSelection();
	}
	else if(document.selection)
	{
		selection = document.selection;
	}
	if(selection)
	{
		if(selection.empty)
		{
			selection.empty();
		}
		if(selection.removeAllRanges)
		{
			selection.removeAllRanges();
		}
	}
}


function convertAtoH(hexstring,size)
{
		hexstring = hexstring.substring(0,size);
		return parseInt(hexstring,16);
}

function downloadLoggingCallback(req)
{
	if (req.readyState == 4)
	{
		
		
		
		
		var str = req.responseText;
		
		var utsstr = str.substring(6,8);
		utsstr += str.substring(4,6);
		utsstr += str.substring(2,4);
		utsstr += str.substring(0,2);
		
		var uts = convertAtoH(utsstr,8);
		
		var date = new Date((uts+1262304000)*1000);
		
		var dln = "";
		
		var y2 = date.getFullYear().toString(10).substring(2);
		
		dln += ('00'+y2).slice(-2);
		dln += ('00'+(date.getMonth()+1)).slice(-2);
		dln += ('00'+date.getDate()).slice(-2);
		dln += ".dlf";
		
		window.location=dln;
	}
}

function downloadLogging()
{
	sendRequest('timestamp.txt?i='+Math.round((Math.random()*999999)), downloadLoggingCallback);
}

function getDeviceNameCallback(req)
{
	if (req.readyState == 4)
	{
		var str = req.responseText;

		var tcon = document.getElementById("tcontroller");
		if(tcon)
		{
			tcon.innerHTML = str;
		}
	}
}

function getDeviceName()
{
	sendRequest('device.txt?i='+Math.round((Math.random()*999999)), getDeviceNameCallback);
}