function createCookie(name, value, days) 
{
	var expires = "";
	if (days) 
	{
		var date = new Date();
		date.setTime(date.getTime() + (days*24*60*60*1000));
		expires = "; expires=" + date.toGMTString();
	}
	document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) 
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for (var i = 0; i < ca.length;i++) 
	{
		var c = ca[i];
		while (c.charAt(0) == ' ') 
			c = c.substring(1, c.length);
		if (c.indexOf(nameEQ) == 0) 
			return c.substring(nameEQ.length, c.length);
	}
	return null;
}

function eraseCookie(name) 
{
	createCookie(name, "", -1);
}

function checkPassword() 
{
	if (readCookie("access") != "yes")
	{
		window.location = "password.htm?url=" + window.location.href;
		return false;
	}
	
	return true;
}

function verifyPassword() 
{
	if (document.myform.password.value == "open")
	{
		createCookie("access", "yes");
		window.location = getParameter('url');
	}
	else
	{
		window.location = "denied.htm";
	}

	return false;
}

function getParameter(parm)
{
	var query = window.location.search.substring(1);
	var parms = query.split('&');
	for (var i = 0; i < parms.length; i++) 
	{
		var pos = parms[i].indexOf('=');
		if (pos > 0) 
		{
			var key = parms[i].substring(0, pos);
			var val = parms[i].substring(pos + 1);
			
			if (key == parm)
				return val;
		}
	}
	
	return null;
}