var xmlHttp

function validateLogin()
{
	var errormsg;
	errormsg = "";

	if (document.Login.Username.value == "")
		errormsg += "Please fill in 'Username'.\n";
		
	if (document.Login.Password.value == "")
		errormsg += "Please fill in 'Password'.\n";

	if ((errormsg == null) || (errormsg == ""))
	{
		return true;
	}

	else
	{
		alert(errormsg);
		return false;
	}
}

function validateNews() 
{
	var errormsg;
	errormsg = "";
		
	if (document.MailingList.newsName.value == "")
		errormsg += "Please fill in 'Name'.\n";
		
	if (document.MailingList.newsEmail.value == "")
		errormsg += "Please fill in 'Email'.\n";
	else
	{
		if (!isEmail(document.MailingList.newsEmail.value))
			errormsg += "Please fill in a valid Email address.\n";
	}
	
	if ((errormsg == null) || (errormsg == ""))
	{
		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null)
		{
			alert ("Your browser does not support AJAX!");
			return;
		}
		var url="mailinglist.asp?newsName="+document.MailingList.newsName.value+"&newsEmail="+document.MailingList.newsEmail.value+"&sid="+Math.random();

		xmlHttp.onreadystatechange=stateChanged;
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);
	}
	else
	{
		alert(errormsg);
		return false;
	}
}

function stateChanged() 
{ 
	if (xmlHttp.readyState==4)
	{ 
		document.getElementById("msg").innerHTML=xmlHttp.responseText;
		document.getElementById("newsName").value="";
		document.getElementById("newsEmail").value="";
	}
}

function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
  	{
		xmlHttp=new XMLHttpRequest();
  	}
	catch (e)
	{
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}