function sendLogin()
{

	username = document.getElementById('Username').value;
	password = document.getElementById('Password').value;
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request");
		return;
	} 
	
	var url="submitlogin.php";
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("POST",url,true);
	xmlHttp.setRequestHeader(
	'Content-Type', 
	'application/x-www-form-urlencoded' 
	);

	qstring = "Username=" + username + "&Password=" + password;
	xmlHttp.send(qstring);
	return false;
}

function sendLogout()
{
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request");
		return;
	} 
	
	var url="submitlogout.php";
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("Get",url,true);
	xmlHttp.setRequestHeader(
	'Content-Type', 
	'application/x-www-form-urlencoded' 
	);
	xmlHttp.send(null);
	return false;
}

function stateChanged() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		document.getElementById("login").innerHTML=xmlHttp.responseText; 
	} 
} 

function GetXmlHttpObject(handler)
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}