function GetCookie (name)
{
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen)
	{
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
			return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
	}
	return null;
}

function SetCookie (name, value)
{
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (argc > 2) ? argv[2] : null;
	var path = (argc > 3) ? argv[3] : null;
	var domain = (argc > 4) ? argv[4] : null;
	var secure = (argc > 5) ? argv[5] : false;
	document.cookie = name + "=" + escape (value) +
	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
	((path == null) ? "" : ("; path=" + path)) +
	((domain == null) ? "" : ("; domain=" + domain)) +
	((secure == true) ? "; secure" : "");
}

function DeleteCookie (name)
{
	var exp = new Date();
	exp.setTime (exp.getTime() - 1);
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}

function getCookieVal(offset)
{
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
		endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

function promptIt()
{
	// Check for existing cookie
	var survey = GetCookie('chamber');
	if( survey == null )
	{
		// Display prompt window if cookie has not been set
		WinId = window.open('chamber.htm','newwin','width=378,height=190,resizable=yes,status');
		if (!WinId.opener) WinId.opener = self;
	}
}

function noThanks()
{
	// User pressed the No Thanks button, so set cookie expiration for x days
	var expDays = 1; // number of days the cookie should last
	var exp = new Date();
	exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
	SetCookie('chamber', '1', exp);
}

function yesThanks()
{
	// User pressed the Yes Thanks button, so set cookie expiration for x days
	var expDays = 1; // number of days the cookie should last
	var exp = new Date();
	exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
	SetCookie('chamber', '1', exp);
}