function hide_auth_panel() {

	if (typeof(MOOdalBox) != 'undefined') {
		MOOdalBox.close();
	}

	$('authPanel_content').style.display = 'none';
	$('authPanel_iframe').style.display = 'none';

	if (auth_type == 'panel' || auth_type == 'panel_by_backup') {
		authPanel = 'error';
	}
	if (auth_type == 'login' || auth_type == 'login_by_backup') {
		authLogin = 'error';
	}
}

function display_auth_panel(async_ajax, additional_func) {
	async_authentication = false;
	additional_auth_func = '';

	var px = document.layers ? "" : "px";

	auth_type = 'panel';

	if (document.documentElement && document.documentElement.scrollTop) {
		sctop = document.documentElement.scrollTop;
	} else {
		sctop = document.body.scrollTop;
	}

	if (async_ajax) {
		async_authentication = true;
	}

	if ($('auth_error')) {
		$('auth_error').innerHTML = '';
	}
	if (additional_func) {
		additional_auth_func = additional_func;
	}

	if ($('authPanel_content') && authPanel == 'loaded') {
		$('authPanel_content').innerHTML = authPanel_saved;
		$('authPanel_content').style.display = 'block';
		$('authPanel_iframe').style.display = 'block';
		if (additional_func && additional_func != "window.location='/'") {
			$('auth_error').innerHTML = "You need to log in to do this.";
			$('auth_error').style.display = 'block';	
		}
		$('txt_login_username').focus();
		window.addEvent('keydown', catch_enter_key);
		$('authPanel_content').style.top = (200 + sctop) +px;
		resize_auth_panel();

		auth_type = 'login';	
		authLogin = '';

		return;
	}

	auth_type = 'panel';
	if (!$('authPanel_content')) {
		var authDiv = document.createElement("DIV");
		authDiv.style.top= (200 + sctop) +px;
		authDiv.style.position="absolute";
		authDiv.style.background="#996600";
		authDiv.id= 'authPanel_content';

		var authIframe = document.createElement("IFRAME");
		authIframe.style.top= (200 + sctop) +px;
		authIframe.style.position="absolute";
		authIframe.id= 'authPanel_iframe';

		document.body.appendChild(authIframe);
		document.body.appendChild(authDiv);

	} else {
		$('authPanel_content').style.display = 'block';
		$('authPanel_iframe').style.display = 'block';
		$('authPanel_content').style.top = (200 + sctop) +px;

		authPanel = 'loading';
	}

	waiting_msg = 'Contacting server ......';
	$('authPanel_content').innerHTML =
		"<div id='error_message' align='left'>"
			+waiting_msg
		+"<br><br><img src='/media/ajax/bar_fff_000.gif' alt='Please wait'>"
		+"<div align='right' valign='bottom'>"
			+"<input type='image' id='close-button' src='/media/07_2008/stickies/x.gif' onClick=hide_auth_panel() border='0'/>"
		+"</div></div>";

	resize_auth_panel();

	load_script('http://www.shmoop.com' +'/ajax/authPanel.php?ver=' +$random(0, 65535));
}

function authenticate() {
	uname = document.getElementById('txt_login_username').value;
	passwd = document.getElementById('txt_login_password').value;

	auth_type = 'login';
	authLogin = '';

	if (uname == '' || passwd == '') {
		$('auth_error').innerHTML = '<img src="/media/07_2008/curtain/error.gif" border="0"> Come on...You have to at least enter your username and password';
		$('auth_error').style.display = 'block';
		resize_auth_panel();
		$('txt_login_username').focus();

		return false;
	}

	waiting_msg = 'Contacting server ......';
	$('authPanel_content').innerHTML =
		"<div id='error_message' align='left'>"
			+waiting_msg
		+"<br><br><img src='/media/ajax/bar_fff_000.gif' alt='Please wait'>"
		+"<div align='right' valign='bottom'>"
			+"<input type='image' id='close-button' src='/media/07_2008/stickies/x.gif' onClick=hide_auth_panel() border='0'/>"
		+"</div></div>";

	resize_auth_panel();
	
	load_script('http://www.shmoop.com' +'/ajax/login.php?u=' +encodeURIComponent(uname) +'&p=' +encodeURIComponent(passwd) +'&ver=' +$random(0, 65535));
}

function signout () {
	auth_type = 'signout';
	authSignout = '';

	load_script('http://www.shmoop.com' +'/ajax/signout.php?ver=' +$random(0,65535));
}

function authPanel_Response(_response) {
	if (authPanel == 'error' || authPanel == 'loaded') {
		return;
	}

	$('authPanel_content').innerHTML = _response;

	if (additional_auth_func != '' && additional_auth_func != "window.location='/'") {
		$('auth_error').innerHTML = "You need to log in to do this.";
		$('auth_error').style.display = 'block';
	} else {
		$('auth_error').innerHTML = '';
		$('auth_error').style.display = 'none';
	}
	resize_auth_panel();

	authPanel_saved = _response;
	authPanel = 'loaded';
	auth_type = 'login';

	$('txt_login_username').focus();

	window.addEvent('keydown', catch_enter_key);
}

function authenticate_Response(_response) {
	if (authLogin == 'error' || authLogin == 'done') {
		return;
	}

	$('authPanel_content').innerHTML = authPanel_saved;
	if (typeof(_response) == "string" && _response.substr(0, 12) == 'Incorrect ID') {
		$('auth_error').innerHTML = '<img src="/media/07_2008/curtain/error.gif" border="0"> Incorrect ID/Password combination. Please try again.';
		$('auth_error').style.display = 'block';
		resize_auth_panel();

		$('txt_login_username').focus();
	} else {
		sessionDataObj = _response;
		$('authPanel_iframe').style.display = 'none';
		$('authPanel_content').style.display = 'none';
		
		ShmoopUser_auth = true;

		if (typeof(MOOdalBox) != 'undefined') {
			MOOdalBox.close();
		}

		<!-- change headers display if presenting as the user has logged in -->
		if ($('LoggedInText')) {
			topnav_header_v1d3_LoggedInText = "Hello " +sessionDataObj.UName +" | "
				+"<a href=\"/my/shmoop\">My Shmoop</a> | "
				+"<a rel='nofollow' href=\"/help\">Help</a> | "
				+"<a rel='nofollow' onClick='javascript:signout()' style=\"cursor:pointer\">Logout</a>";
			$('LoggedInText').innerHTML = topnav_header_v1d3_LoggedInText;
		}

		if ($('div_benefits')) {
			$('div_myshmoop').style.display = 'block';
			$('div_logout').style.display = 'block';
			$('div_login').style.display = 'none';
			$('div_join').style.display = 'none';
		}
		if ($('div_benefits_topnav')) {
			$('div_myshmoop').style.display = 'block';
			$('div_logout').style.display = 'block';
			$('div_login').style.display = 'none';
			$('div_join').style.display = 'none';
		}
		
		if (additional_auth_func != '') {
			if (additional_auth_func == 'FORM') {
				additional_auth_func_form.submit();
			} else {
				<!-- the setTimeout() is needed for resetToolBar() to work -->
				setTimeout("eval(additional_auth_func)", 0);
			}
		}

		if ($('stick_container')) {
			var showBox = false;
			refreshStickies(showBox);
		}
	}

	authLogin = 'done';
}

function signout_Response(_response) {
	if (authSignout == 'signed_out' || authSignout == 'error') {
		return;
	}

	if (_response == 'HOME_URL') {
		window.location = '/';
	} else if(_response != 'CURRENT_URL') {
		window.location = _response;
	} else {
		ShmoopUser_auth = false;
		sessionDataObj.UFirstName = '';
		sessionDataObj.UName = '';
		sessionDataObj.UEncrypt = '';

		<!-- change headers display if presenting as the user has logged out -->
		if ($('LoggedInText')) {
			topnav_header_v1d3_LoggedOutText = '<a id="loginAuthPanelFadeIn" style="cursor:pointer" rel="nofollow">Login</a> | '
				+"<a rel='nofollow' href=\"/help\">Help</a> | "
				+"<a rel='nofollow' href=\"/signup\">Sign Up!</a>";
			$('LoggedInText').innerHTML = topnav_header_v1d3_LoggedOutText;

			$('loginAuthPanelFadeIn').addEvent('click', function(e) {
				MOOdalBox.open("javascript:display_auth_panel(true, '')", "", "");
			});
		}
		if ($('div_benefits')) {
			$('div_myshmoop').style.display = 'none';
			$('div_logout').style.display = 'none';
			$('div_login').style.display = 'block';
			$('div_join').style.display = 'block';
		}
		if ($('div_benefits_topnav')) {
			$('div_myshmoop').style.display = 'none';
			$('div_logout').style.display = 'none';
			$('div_login').style.display = 'block';
			$('div_join').style.display = 'block';
		}

		if ($('ModalWindow_MyFolders')) {
			$('ModalWindow_MyFolders').innerHTML = '';
			$('ModalWindow_MyFolders').style.display = 'none';
		}

		if ($('stick_container')) {
			removeAllStickies();
		}

		if ($('ModalWindow_ChooseFolder')) {
			$('ModalWindow_ChooseFolder_Select').length = 0;
			document.getElementById('ModalWindow_ChooseFolder').style.display = 'none';
		}

		if ($('ModalWindow_CreateFolder')) {
			$('ModalWindow_CreateFolder').style.display = 'none';
		}

		if ($('ModalWindow_CreateStickies')) {
			$('ModalWindow_CreateStickies').style.display = 'none';
		}

		if ($('ModalWindow_Delete')) {
			$('ModalWindow_Delete').style.display = 'none';
		}
	}

	authSignout = 'signed_out';
}

function load_script(scr) {
	var head = document.getElementsByTagName("head").item(0);
	var script = document.createElement("script");

	script.setAttribute("type", "text/javascript");
	script.setAttribute("src", scr);

	head.appendChild(script);

	check_status.delay(2000, auth_type);
}

var check_status = function() {
	if ((this == 'panel' || this == 'panel_by_backup') && authPanel == 'loaded') {
		return;
	}
	if ((this == 'login' || this == 'login_by_backup') && authLogin == 'done') {
		return;
	}
	if ((this == 'signout' || this == 'signout_by_backup') && authSignout == 'signed_out') {
		return;
	}

	if (this == 'panel') {
		auth_type = 'panel_by_backup';
		load_script('http://www.shmoop.com' +'/ajax/authPanel.php?ver=' +$random(0, 65535));
		return;
	}
	if (this == 'login') {
		auth_type = 'login_by_backup';
		load_script('http://www.shmoop.com' +'/ajax/login.php?u=' +encodeURIComponent(uname)
			+'&p=' +encodeURIComponent(passwd) +'&ver=' +$random(0, 65535));
		return;
	}

	if (this == 'panel_by_backup') {
		authPanel = 'error';
	}

	if (this == 'login_by_backup') {
		authLogin = 'error';
	}	

	if (this != 'signout' && this != 'signout_by_backup') {
		if (additional_auth_func != '') {
			auth_msg = "You need to log in to do this.<br>But the authentication server is off line.";
		} else {
			auth_msg = "Authentication server is off line.";
		}
		$('authPanel_content').innerHTML =
			"<div id='error_message' align='left'>"
				+auth_msg
				+" <br>Please try again later."
			+"<div align='right' valign='bottom'>"
				+"<input type='image' id='close-button' src='/media/07_2008/stickies/x.gif' onClick=hide_auth_panel() border='0'/>"
			+"</div></div>";
	
		resize_auth_panel();
	} else if (this == 'signout') {
		auth_type = 'signout_by_backup';
		load_script('http://www.shmoop.com' +'/ajax/signout.php?ver=' +$random(0, 65535));
	} else {
		shmoop_cookie = Cookie.get('MyShmoop');
		if (shmoop_cookie != '') {
			cookie_obj = eval ('(' + shmoop_cookie + ')');
			delete cookie_obj['UFirstName'];
			delete cookie_obj.UName;
			delete cookie_obj.UEncrypt;
			delete cookie_obj.UStart;

			shmoop_cookie = '{';
			for (i in cookie_obj) {
				shmoop_cookie +='"' +i +'":"' +cookie_obj[i] +'",';
			}
			shmoop_cookie += '}';
			shmoop_cookie = shmoop_cookie.replace(',}', "}");
			if (shmoop_cookie.length > 2) {
				Cookie.set('MyShmoop', shmoop_cookie, {path: '/', domain: '.shmoop.com'});
			} else {
				Cookie.remove('MyShmoop',  {path: '/', domain: '.shmoop.com'});
			}
		}
		signout_Response('CURRENT_URL');
	}
};

function resize_auth_panel() {
	var px = document.layers ? "" : "px";

	if (document.documentElement && document.documentElement.scrollTop) {
		sctop = document.documentElement.scrollTop;
	} else {
		sctop = document.body.scrollTop;
	}

	auth_div = $('authPanel_content');
	auth_iframe = $('authPanel_iframe');

	auth_div.style.top = (200 + sctop) +px;
	
	auth_iframe.style.width = (auth_div.offsetWidth - 5) +px;
	auth_iframe.style.height = (auth_div.offsetHeight - 10) +px;
	auth_iframe.style.left = '25%';
	auth_iframe.style.top = (auth_div.offsetTop+2) +px;
}

function invite_friends() {
	if (sessionDataObj.UEncrypt && sessionDataObj.UEncrypt != '') {
		window.location = '/InviteFriends/';
	} else {
		additional_func = "window.location = '/InviteFriends/'";
		MOOdalBox.open("javascript:display_auth_panel(false, additional_func)", "", "");
	}
}

function write_paper_nav(formObj) {
	if (!sessionDataObj || sessionDataObj.UEncrypth == '') {
		additional_auth_func_form = formObj;
		MOOdalBox.open("javascript:display_auth_panel(false, 'FORM')", "", "");
		return false;
	}
	
	formObj.submit();
}

function catch_enter_key(e) {
	var event = new Event(e);

	if (event.key == 'enter') {
		event.stop();
		authenticate();
	}
}	

function load_auth_button() {
	if ($('loginHomeAuthPanelFadeIn')) {
		$('loginHomeAuthPanelFadeIn').addEvent('click', function(e) {
			MOOdalBox.open("javascript:display_auth_panel(false, \"window.location='/'\")", "", "");
		});
	}

	if ($('loginAuthPanelFadeIn')) {
		$('loginAuthPanelFadeIn').addEvent('click', function(e) {
			MOOdalBox.open("javascript:display_auth_panel(true, '')", "", "");
		});
	}

	if ($('loginAuthPanel_1_FadeIn')) {
		$('loginAuthPanel_1_FadeIn').addEvent('click', function(e) {
			MOOdalBox.open("javascript:display_auth_panel(true, '')", "", "");
		});
	}

	if ($('toolBarStickieAuthPanelFadeIn')) {
		$('toolBarStickieAuthPanelFadeIn').addEvent('click', function(e) {
			toolBarRedirectLogin(e, 'stickie');
		});
	}
	
	if ($('toolBarDiscussAuthPanelFadeIn')) {
		$('toolBarDiscussAuthPanelFadeIn').addEvent('click', function(e) {
			toolBarRedirectLogin(e, 'discuss');
		});
	}
	
	if ($('toolBarFolderAuthPanelFadeIn')) {
		$('toolBarFolderAuthPanelFadeIn').addEvent('click', function(e) {
			toolBarRedirectLogin(e, 'myfolders');
		});
	}
	
	if ($('inviteFriendsAuthPanelFadeIn')) {
		$('inviteFriendsAuthPanelFadeIn').addEvent('click', function(e) {
			invite_friends();
		});
	}
	
	if ($('div_promo_invitefriends')) {
		$('div_promo_invitefriends').addEvent('click', function(e) {
			invite_friends();
		});
	}
}

if(window.addEventListener) {
	window.addEventListener('load', load_auth_button, false);
} else if(window.attachEvent) {
	window.attachEvent('onload', load_auth_button);
}

var sessionDataObj = {"UFirstName":"","UName":"","UEncrypt":""};
var async_authentication = false;
var additional_auth_func = '';
var additional_auth_func_form = null;
var auth_type = '';
var authPanel = '';
var authLogin = '';
var authSignout = '';
var authPanel_saved = '';