//***********************************************************************************************************************************/
// MM changed Lytebox,  April 03, 2008
// changes:
//				* added the possibility to open a page in an iframe
//					(use rel="lbif_name" to use the iframe in a lightbox. The url is generated with the 'name'. here: lexikon_name.php
//   09.09.2009
// 			* added function to open lightbox manually
//				* added fade with scriptaculous.js  (so that library has alo to be included)
//					
//
//***********************************************************************************************************************************/
/*
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.prepareIE('110%', 'auto');
			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){
		// MM replace 
		//$('overlay').style.display = display;
		// MM replace with
		lb_fade('overlay',display,0.8);
		// MM replace 
		//$(this.content).style.display = display;
		// MM replace with
		var relParts = this.content.split("_");
		// when no iframe should be opened use the old way
		if (relParts[0] != 'lbif'){
			// MM replace 
			//$(this.content).style.display = display;
			// MM replace with
			lb_fade( this.content,display,1.0);
		}else{
			// open layer with iframe
			// MM replace 
			//$('lb_iframe').style.display = display;
			// MM replace with
			lb_fade('lb_iframe',display,1.0);
			
			// load content into iframe
			var name = this.content.replace(/^lbif_/,'');
			var url = name + '.php?target=iframe';
			loadIframe(url);
		}
		// MM replace end
		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);
}
		
function loadIframe(url){
	document.getElementById('lightboxIframe').setAttribute('src', url);
}
/**
* MM: function to open a lightbox manually
*	@param id_name : name of lightbox to display
*	@param fade : flag to show or hide the lightbox
*	@param opacity : 
*
**/
function lb_fade(id_name,display,opacity){
	if(display=='block'){
		$(id_name).style['opacity'] = '.0';
		$(id_name).style['filter'] = 'alpha(opacity=0)';
		$(id_name).style['-moz-opacity']= '0.0';
		$(id_name).style.display = display;
		new Effect.Opacity(
		   id_name, { 
		      from: 0.0, 
		      to: opacity,
		      duration: 3.0
		   }
		);
	}else{
		$(id_name).fade({ duration: 2.0, from: opacity, to: 0 });
	}
}

/////////////////////////////////////////////////////////////////////////
//// functions to display lightbox manually

/////////////////////////////////////////////////
/**
* MM: function to open a lightbox manually
*	@param id_name : name of lightbox to display
*	@param display : flag to show or hide the lightbox
*
**/
/*
function displayLightboxManually2(id_name,display){
	//if (display=='block'){
	//	bod 				= document.getElementsByTagName('body')[0];
	//	overlay2 			= document.createElement('div');
	//	overlay2.id			= 'overlay2';
	//	bod.appendChild(overlay2);
	//	$('overlay2').style.display = display;
	//}else{
		//remove($('overlay2'));
	//	$('overlay2').style.display = display;
	//}
	if (checkIt('msie')){
				lb_ie_settings();
			}
	addLightboxMarkup();
	$('overlay').style.display = display;

	
	
	// MM replace 
	//$(this.content).style.display = display;
	// MM replace with
	var relParts = id_name.split("_");
	// when no iframe should be opened use the old way
	if (relParts[0] != 'lbif'){
		$(id_name).style.display = display;
	}else{
		// open layer with iframe
		$('lb_iframe').style.display = display;
		// load content into iframe
		var name = id_name.replace(/^lbif_/,'');
		var url = name + '.php?target=iframe';
		loadIframe(url);
	}
}
*/

function displayLightboxManually(id_name){
	lbox = document.getElementsByClassName('lbOn');
	for(i = 0; i < lbox.length; i++) {
		if(lbox[i].rel==id_name){
			if (checkIt('msie')){
				lb_ie_settings();
			}
			addLightboxMarkup();
			myLightbox = new lightbox(lbox[i]);
			myLightbox.activate();
			/*if (display=='block')
				myLightbox.displayLightbox("block");
			else
				myLightbox.displayLightbox("none");*/
		}
	}
}

function lb_ie_settings(){
	lb_getScroll();
	lb_prepareIE('110%', 'auto');
	lb_setScroll(0,0);
	lb_hideSelects('hidden');
}
function lb_getScroll(){
	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;
	}
}
function lb_prepareIE(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; 
}
function lb_setScroll(x, y){
	window.scrollTo(x, y); 
}
function lb_hideSelects(visibility){
	selects = document.getElementsByTagName('select');
	for(i = 0; i < selects.length; i++) {
		selects[i].style.visibility = visibility;
	}
}