function switchPuzzleHeader()
{

}

function checkField(elementID, alertText)
{
	var fld = document.getElementById(elementID);
	if (fld.value == null || fld.value == "")
	{
		alert(alertText);
		return false;
	}
	return true;
}

function checkCombo(elementID, alertText)
{
	var cbo = document.getElementById(elementID);
	if (cbo.selectedIndex == 0)
	{
		alert(alertText);
		return false;
	}
	return true;
}

var myLoginBox;

function checkAnswerForm()
{
	if (!checkField('AnswerBox', 'You must enter your answer')) return false;

	myLoginBox = new lightbox('LoginForm', 'frmAnswer');
	myLoginBox.activate();

	return false;
}

function checkAskForm()
{
	if (!checkField('txtTopic', 'You must enter a topic title')) return false;
	if (!checkField('AskBox', 'You must enter your question')) return false;
	if (!checkCombo('ddCategories', 'Please selected a category where you want to post your question')) return false;

	myLoginBox = new lightbox('LoginForm', 'frmAsk');
	myLoginBox.activate();

	return false;
}

function submitAsMember()
{
	// Retrieve username and password
	var objUsername = document.getElementById("txtUsername");
	var objPassword = document.getElementById("txtPassword");

	// Set form values
	var frm = document.getElementById(myLoginBox.formName);
	for (i=0; i < frm.elements.length; i++)
	{
		if (frm.elements[i].name == "Username")
		{
			frm.elements[i].value = objUsername.value;
		}
		if (frm.elements[i].name == "Password")
		{
			frm.elements[i].value = objPassword.value;
		}	
	}
	frm.submit();
}


function submitFormAsGuest()
{
	// Set form values
	var frm = document.getElementById(myLoginBox.formName);
	for (i=0; i < frm.elements.length; i++)
	{
		if (frm.elements[i].name == "PostAsGuest")
		{
			frm.elements[i].value = "1";
		}
	}
	frm.submit();
}

/*
Created By: Chris Campbell
Website: http://particletree.com
Date: 2/1/2006

Adapted By: Simon de Haan
Website: http://blog.eight.nl
Date: 21/2/2006

Inspired by the lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
And the lightbox gone wild by ParticleTree at http://particletree.com/features/lightbox-gone-wild/

*/

/*-------------------------------GLOBAL VARIABLES------------------------------------*/

var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

/*-----------------------------------------------------------------------------------------------*/

//Browser detect script origionally created by Peter Paul Koch at http://www.quirksmode.org/

function getBrowserInfo() {
	if (checkIt('konqueror')) {
		browser = "Konqueror";
		OS = "Linux";
	}
	else if (checkIt('safari')) browser 	= "Safari"
	else if (checkIt('omniweb')) browser 	= "OmniWeb"
	else if (checkIt('opera')) browser 		= "Opera"
	else if (checkIt('webtv')) browser 		= "WebTV";
	else if (checkIt('icab')) browser 		= "iCab"
	else if (checkIt('msie')) browser 		= "Internet Explorer"
	else if (!checkIt('compatible')) {
		browser = "Netscape Navigator"
		version = detect.charAt(8);
	}
	else browser = "An unknown browser";

	if (!version) version = detect.charAt(place + thestring.length);

	if (!OS) {
		if (checkIt('linux')) OS 		= "Linux";
		else if (checkIt('x11')) OS 	= "Unix";
		else if (checkIt('mac')) OS 	= "Mac"
		else if (checkIt('win')) OS 	= "Windows"
		else OS 						= "an unknown operating system";
	}
}

function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

/*-----------------------------------------------------------------------------------------------*/

Event.observe(window, 'load', getBrowserInfo, false);
Event.observe(window, 'unload', Event.unloadCache, false);

var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize: function(ctrl, formName) {
		this.content = ctrl;
		this.formName = formName;
		//this.content = ctrl.rel;
		//Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
		//ctrl.onclick = function(){return false;};
	},
	
	// Turn everything on - mainly the IE fixes
	activate: function(){
		
		if (browser == 'Internet Explorer'){
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0,0);
			this.hideSelects('hidden');
		}
		this.displayLightbox("block");
	},
	
	// Ie requires height to 100% and overflow hidden or else you can scroll down past the lightbox
	prepareIE: function(height, overflow){
		bod = document.getElementsByTagName('body')[0];
		bod.style.height = height;
		bod.style.overflow = overflow;
  
		htm = document.getElementsByTagName('html')[0];
		htm.style.height = height;
		htm.style.overflow = overflow; 
	},
	
	// In IE, select elements hover on top of the lightbox
	hideSelects: function(visibility){
		selects = document.getElementsByTagName('select');
		for(i = 0; i < selects.length; i++) {
			selects[i].style.visibility = visibility;
		}
	},
	
	// Taken from lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
	getScroll: function(){
		if (self.pageYOffset) {
			this.yPos = self.pageYOffset;
		} else if (document.documentElement && document.documentElement.scrollTop){
			this.yPos = document.documentElement.scrollTop; 
		} else if (document.body) {
			this.yPos = document.body.scrollTop;
		}
	},
	
	setScroll: function(x, y){
		window.scrollTo(x, y); 
	},
	
	displayLightbox: function(display){
		$('overlay').style.display = display;
		$(this.content).style.display = display;
		if(display != 'none') this.actions();		
	},
	
	// Search through new links within the lightbox, and attach click event
	actions: function(){
		lbActions = document.getElementsByClassName('lbAction');

		for(i = 0; i < lbActions.length; i++) {
			Event.observe(lbActions[i], 'click', this[lbActions[i].rel].bindAsEventListener(this), false);
			lbActions[i].onclick = function(){return false;};
		}

	},
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		
		this.displayLightbox("none");
	}
}