var startpage = location.search.substr(1);

function Login_OK () {
	var username;
	if (document.loginForm.username.value == '') {
		if (confirm('You didn\'t enter a username.  Would you like to log in as a Guest?')) {
			username = "Guest";
			document.loginForm.username.value = "Guest";
		} else {
			document.loginForm.username.select ();
			return false;
		}
	} else {
		username = document.loginForm.username.value;
	}
	
	if (username != 'Guest' && username != 'guest' && document.loginForm.password.value == '') {
		if (confirm('You didn\'t enter a password.  Would you like to log in as a Guest?')) {
			username = "Guest";
			document.loginForm.username.value = "Guest";
		} else {
			document.loginForm.password.select ();
			return false;
		}
	}
	
	// store the user's name to fill in later
	var later = new Date();
	later.setFullYear (later.getFullYear() + 10);
	document.cookie = "sftoaot=" + username + "; path=/; expires=" + later.toGMTString();
	
	// If a startpage was sent in, store it in the appropriate cookie
	if (startpage != "")
		document.cookie = username + "=" + startpage + "; path=/; expires=" + later.toGMTString();
	
	return true;
}

function Show_Supp (href) {
	Open_Supp_Window ('start/loginhelp.html?' + href);
}

function Open_Tour () {
	Open_Supp_Window ('tour/tour.html');
}

var suppwin;
function Open_Supp_Window (href) {
	if (suppwin != null && !suppwin.closed)
		suppwin.focus ();
	suppwin = window.open (href, "tourWindow", "top=20,left=20,width=630,height=440,scrollbars,resizable,menubar", true);
}

function Fillin_Username () {
	var cook = document.cookie;
	var pos = cook.indexOf ("sftoaot=");
	if (pos != -1) {
		var start = pos + 8;
		var end = cook.indexOf (";", start);
		if (end == -1) end = cook.length;
		cook = cook.substring (start, end);
		document.loginForm.username.value = cook;
	}

	document.loginForm.username.select ();
}