/*

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', initialize, false);

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) {

		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");

	}

}



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



// Onload, make all links that need to trigger a lightbox active

function initialize(){

	addLightboxMarkup();

	lbox = document.getElementsByClassName('lbOn');

	for(i = 0; i < lbox.length; i++) {

		valid = new lightbox(lbox[i]);

	}

}



// Add in markup necessary to make this work. Basically two divs:

// Overlay holds the shadow

// Lightbox is the centered square that the content is put into.

function addLightboxMarkup() {



	bod 				= document.getElementsByTagName('body')[0];



	overlay 			= document.createElement('div');

	overlay.id			= 'overlay';



	bod.appendChild(overlay);

}