/**

	NGS Embed Version 1.42  (ufo 3.22 final)
	
	Standard method of embedding flash accross National Geographic.  Relies on 
	3rd party technologies for implementation and manipulation of HTML and the DOM.
	
	This approach solves replacing outdated technology, IE plugin issues, and
	streamlines the way we write flash on the site.  The assumption with this 
	embedding script is that no matter what technology is used, a div container 
	will get replaced with flash content.  This is to promote SEO and privde 
	non-flash alternatives.
	
	Current embedding technology is UFO which is included in this file. 
	
	Code by Paul Hannan 6.5.2008
	
*/


// NGS namespace
if (window.NGS == undefined){
	var NGS = {};
};	


var ngsEmbed = {
	
	version : "1.4.0",
	embed:"",
	batch:"",
	
	flash : function(config, target, cName){		
		this.embed = new NGS.Flash(config);		
		this.embed.write(target, cName);					
	},
		
	hasFlash: function(version, build){
		if (version == undefined){
			version = 0;
		}
		if (build == undefined){
			build = 0;	
		}
		
		UFO.getFlashVersion()
		return UFO.hasFlashVersion(version, build);	 // uses ufo for detection
	},
	
	flashBatch: function(array){		
		this.batch = array;
		// check to see if dom is loaded, otherwise add to load event
		if((document.getElementsByTagName("body")[0] != null || document.body != null)) {
			this.processBatch();
		} else {			
			NGS.onload(Delegate.create(this, this.processBatch));
		}			
	},
	
	processBatch:function(){
		if (this.batch == undefined) return;		
		for (var itm in this.batch){			
			if (document.getElementById(this.batch[itm].divContainer)){
				alert('writing to ' + this.batch[itm].divContainer );	
				this.flash(this.batch[itm].embedObject, this.batch[itm].divContainer, this.batch[itm].newClass);
			}			
		}	
	}

};

/*********************************************************
				CLASS AbstractPlugin
*********************************************************/

NGS.AbstractPlugin = function(){
	return true;	
}

NGS.AbstractPlugin.prototype = {

	embedObject : "",
	config :"",
	cName: "undefined",
	targetDiv: "null",
	
	// write embed code to a div container
	write : function(d, cl){
			
		// dont do anything if flash version is not met
		if (!ngsEmbed.hasFlash(this.config.version)){		
			return;	
		}
				
		this.cName = cl;

		if (!this.embedObject){		
			//document.write(' --> no embed object found ');			
			this.embedObject = this.getEmbed();
		}
		
		this.embedObject.write(this.config,d);	
		
		// if class is passed in, replace it on div once dom isloaded
		if (this.cName != undefined && this.cName != "undefined"){					
			this.targetDiv = d;			
			NGS.onload(Delegate.create(this, this.changeClass))			
		}
	},

	getConfig : function(){
		return this.config;
	},
	
	changeClass:function(){			
		NGS.changeStyleClass(this.cName, this.targetDiv);
	}

};


/*********************************************************
				CLASS Flash 
*********************************************************/

// define constructor
NGS.Flash = function(c){	
	this.config = c; // parameters		
	return true;	
};


// extend class
NGS.Flash.prototype = new NGS.AbstractPlugin();


// returns code for embedding flash, uses UFO
NGS.Flash.prototype.getEmbed = function(){		
	return new NGS.UfoWrapper();
};
	
		

/*********************************************************
				ErrorMsg
*********************************************************/

NGS.ErrorMsg = function(msg){
	throw("NGS ERROR: " + msg);
};

/*********************************************************
				Class AbstractFlash
*********************************************************/
// abstract class.  Base class for all flash embed wrappers.  

NGS.AbstractFlash = function(){
	return true;
};

NGS.AbstractFlash.prototype = {

	// variables
	_required : ["src", "width", "height", "version", "build"],
	_optional : ["id", "name", "align", "swliveconnect", "play", "loop", 
				"menu", "quality", "scale", "salign", "wmode", "bgcolor", "base",
				 "flashvars", "devicefont", "allowscriptaccess", "seamlesstabbing",
				 "allowfullscreen", "expressInstall"],
	
	// check to make sure all required elements are defined
	initRequired : function(c){
			var total = this._required.length;
			for (var i = 0; i < total; i++) {
				if (typeof c[this._required[i]] == "undefined") {				
					if (this._required[i] == "build"){
						c[this._required[i]] = "0";
					} else {
						NGS.ErrorMsg("Required parameter '" + this._required[i] + "' not found");
					}
				}
			}
			return c;
		},
		
	// fill in optional defaults	
	initOptional : function(c){
		
		if (typeof c["allowfullscreen"] == "undefined") {							
			c["allowfullscreen"] = "true";
		}
		
		if (typeof c["flashvars"] == "object"){
			var newval="";
			for (var tt in c["flashvars"]){
				newval += tt + "=" + c["flashvars"][tt] + "&";
			}
			c["flashvars"] = newval;
		}
		
		return c;
	},			
		
	optional : function(){
			return this._optional;
	},
		
	required : function(){
			return this._required;
	}
		
};

/*********************************************************
				Class UfoWrapper
*********************************************************/


/** 
* class for creating ufo objects
* this embedding method plays nice with the DOM
*/

// constructor
NGS.UfoWrapper = function(){
	this.typename = "ufo wrapper";
	return true;	
};

// extend class
NGS.UfoWrapper.prototype = new NGS.AbstractFlash();


// write method
NGS.UfoWrapper.prototype.write = function(config, div){		
	
	//document.write('--> writing ufo');
	
	config = this.initRequired(config);
	config = this.initOptional(config);
	
	// create object
	var FO = { 
			movie: config.src, 
			width: config.width, 
			height: config.height,
			majorversion: config.version,
			build: config.build
			};
			
	 
	 // add optional parameters
	 var optionalArr = this.optional();	
	 var total = optionalArr.length;					
	 for (var i = 0; i < total; i++) {
		if (typeof config[optionalArr[i]] != "undefined") {
			FO[optionalArr[i]] = config[optionalArr[i]];
		}
	 }	
			
	UFO.create(FO, div);	
	
};
	

/*********************************************************/
				

/*	Unobtrusive Flash Objects (UFO) v3.22 <http://www.bobbyvandersluis.com/ufo/>
	Copyright 2005-2007 Bobby van der Sluis
	This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/>
*/

var UFO = {
	req: ["movie", "width", "height", "majorversion", "build"],
	opt: ["play", "loop", "menu", "quality", "scale", "salign", "wmode", "bgcolor", "base", "flashvars", "devicefont", "allowscriptaccess", "seamlesstabbing", "allowfullscreen", "allownetworking"],
	optAtt: ["id", "name", "align"],
	optExc: ["swliveconnect"],
	ximovie: "ufo.swf",
	xiwidth: "215",
	xiheight: "138",
	ua: navigator.userAgent.toLowerCase(),
	pluginType: "",
	fv: [0,0],
	foList: [],
		
	create: function(FO, id) {
		
		if (!UFO.uaHas("w3cdom") || UFO.uaHas("ieMac")) return;
		UFO.getFlashVersion();
		UFO.foList[id] = UFO.updateFO(FO);
		UFO.createCSS("#" + id, "visibility:hidden;");
		UFO.domLoad(id);
	},

	updateFO: function(FO) {
		if (typeof FO.xi != "undefined" && FO.xi == "true") {
			if (typeof FO.ximovie == "undefined") FO.ximovie = UFO.ximovie;
			if (typeof FO.xiwidth == "undefined") FO.xiwidth = UFO.xiwidth;
			if (typeof FO.xiheight == "undefined") FO.xiheight = UFO.xiheight;
		}
		FO.mainCalled = false;
		return FO;
	},

	domLoad: function(id) {
		var _t = setInterval(function() {
			if ((document.getElementsByTagName("body")[0] != null || document.body != null) && document.getElementById(id) != null) {
				UFO.main(id);
				clearInterval(_t);
			}
		}, 250);
		if (typeof document.addEventListener != "undefined") {
			document.addEventListener("DOMContentLoaded", function() { UFO.main(id); clearInterval(_t); } , null); // Gecko, Opera 9+
		}
	},

	main: function(id) {
		var _fo = UFO.foList[id];
		if (_fo.mainCalled) return;
		UFO.foList[id].mainCalled = true;
		document.getElementById(id).style.visibility = "hidden";
		if (UFO.hasRequired(id)) {
			if (UFO.hasFlashVersion(parseInt(_fo.majorversion, 10), parseInt(_fo.build, 10))) {
				if (typeof _fo.setcontainercss != "undefined" && _fo.setcontainercss == "true") UFO.setContainerCSS(id);
				UFO.writeSWF(id);
			}
			else if (_fo.xi == "true" && UFO.hasFlashVersion(6, 65)) {
				UFO.createDialog(id);
			}
		}
		document.getElementById(id).style.visibility = "visible";
	},
	
	createCSS: function(selector, declaration) {
		var _h = document.getElementsByTagName("head")[0]; 
		var _s = UFO.createElement("style");
		if (!UFO.uaHas("ieWin")) _s.appendChild(document.createTextNode(selector + " {" + declaration + "}")); // bugs in IE/Win
		_s.setAttribute("type", "text/css");
		_s.setAttribute("media", "screen"); 
		_h.appendChild(_s);
		if (UFO.uaHas("ieWin") && document.styleSheets && document.styleSheets.length > 0) {
			var _ls = document.styleSheets[document.styleSheets.length - 1];
			if (typeof _ls.addRule == "object") _ls.addRule(selector, declaration);
		}
	},
	
	setContainerCSS: function(id) {
		var _fo = UFO.foList[id];
		var _w = /%/.test(_fo.width) ? "" : "px";
		var _h = /%/.test(_fo.height) ? "" : "px";
		UFO.createCSS("#" + id, "width:" + _fo.width + _w +"; height:" + _fo.height + _h +";");
		if (_fo.width == "100%") {
			UFO.createCSS("body", "margin-left:0; margin-right:0; padding-left:0; padding-right:0;");
		}
		if (_fo.height == "100%") {
			UFO.createCSS("html", "height:100%; overflow:hidden;");
			UFO.createCSS("body", "margin-top:0; margin-bottom:0; padding-top:0; padding-bottom:0; height:100%;");
		}
	},

	createElement: function(el) {
		return (UFO.uaHas("xml") && typeof document.createElementNS != "undefined") ?  document.createElementNS("http://www.w3.org/1999/xhtml", el) : document.createElement(el);
	},

	createObjParam: function(el, aName, aValue) {
		var _p = UFO.createElement("param");
		_p.setAttribute("name", aName);	
		_p.setAttribute("value", aValue);
		el.appendChild(_p);
	},

	uaHas: function(ft) {
		var _u = UFO.ua;
		switch(ft) {
			case "w3cdom":
				return (typeof document.getElementById != "undefined" && typeof document.getElementsByTagName != "undefined" && (typeof document.createElement != "undefined" || typeof document.createElementNS != "undefined"));
			case "xml":
				var _m = document.getElementsByTagName("meta");
				var _l = _m.length;
				for (var i = 0; i < _l; i++) {
					if (/content-type/i.test(_m[i].getAttribute("http-equiv")) && /xml/i.test(_m[i].getAttribute("content"))) return true;
				}
				return false;
			case "ieMac":
				return /msie/.test(_u) && !/opera/.test(_u) && /mac/.test(_u);
			case "ieWin":
				return /msie/.test(_u) && !/opera/.test(_u) && /win/.test(_u);
			case "gecko":
				return /gecko/.test(_u) && !/applewebkit/.test(_u);
			case "opera":
				return /opera/.test(_u);
			case "safari":
				return /applewebkit/.test(_u);
			default:
				return false;
		}
	},
	
	getFlashVersion: function() {
		if (UFO.fv[0] != 0) return;  
		if (navigator.plugins && typeof navigator.plugins["Shockwave Flash"] == "object") {
			UFO.pluginType = "npapi";
			var _d = navigator.plugins["Shockwave Flash"].description;
			if (typeof _d != "undefined") {
				_d = _d.replace(/^.*\s+(\S+\s+\S+$)/, "$1");
				var _m = parseInt(_d.replace(/^(.*)\..*$/, "$1"), 10);
				var _r = /r/.test(_d) ? parseInt(_d.replace(/^.*r(.*)$/, "$1"), 10) : 0;
				UFO.fv = [_m, _r];
			}
		}
		else if (window.ActiveXObject) {
			UFO.pluginType = "ax";
			try { // avoid fp 6 crashes
				var _a = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");
			}
			catch(e) {
				try { 
					var _a = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");
					UFO.fv = [6, 0];
					_a.AllowScriptAccess = "always"; // throws if fp < 6.47 
				}
				catch(e) {
					if (UFO.fv[0] == 6) return;
				}
				try {
					var _a = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
				}
				catch(e) {}
			}
			if (typeof _a == "object") {
				var _d = _a.GetVariable("$version"); // bugs in fp 6.21/6.23
				if (typeof _d != "undefined") {
					_d = _d.replace(/^\S+\s+(.*)$/, "$1").split(",");
					UFO.fv = [parseInt(_d[0], 10), parseInt(_d[2], 10)];
				}
			}
		}
	},

	hasRequired: function(id) {
		var _l = UFO.req.length;
		for (var i = 0; i < _l; i++) {
			if (typeof UFO.foList[id][UFO.req[i]] == "undefined") return false;
		}
		return true;
	},
	
	hasFlashVersion: function(major, release) {		
		return (UFO.fv[0] > major || (UFO.fv[0] == major && UFO.fv[1] >= release)) ? true : false;
	},

	writeSWF: function(id) {
		var _fo = UFO.foList[id];
		var _e = document.getElementById(id);
		if (UFO.pluginType == "npapi") {
			if (UFO.uaHas("gecko") || UFO.uaHas("xml")) {
				while(_e.hasChildNodes()) {
					_e.removeChild(_e.firstChild);
				}
				var _obj = UFO.createElement("object");
				_obj.setAttribute("type", "application/x-shockwave-flash");
				_obj.setAttribute("data", _fo.movie);
				_obj.setAttribute("width", _fo.width);
				_obj.setAttribute("height", _fo.height);
				var _l = UFO.optAtt.length;
				for (var i = 0; i < _l; i++) {
					if (typeof _fo[UFO.optAtt[i]] != "undefined") _obj.setAttribute(UFO.optAtt[i], _fo[UFO.optAtt[i]]);
				}
				var _o = UFO.opt.concat(UFO.optExc);
				var _l = _o.length;
				for (var i = 0; i < _l; i++) {
					if (typeof _fo[_o[i]] != "undefined") UFO.createObjParam(_obj, _o[i], _fo[_o[i]]);
				}
				_e.appendChild(_obj);
			}
			else {
				var _emb = "";
				var _o = UFO.opt.concat(UFO.optAtt).concat(UFO.optExc);
				var _l = _o.length;
				for (var i = 0; i < _l; i++) {
					if (typeof _fo[_o[i]] != "undefined") _emb += ' ' + _o[i] + '="' + _fo[_o[i]] + '"';
				}
				_e.innerHTML = '<embed type="application/x-shockwave-flash" src="' + _fo.movie + '" width="' + _fo.width + '" height="' + _fo.height + '" pluginspage="http://www.macromedia.com/go/getflashplayer"' + _emb + '></embed>';
			}
		}
		else if (UFO.pluginType == "ax") {
			var _objAtt = "";
			var _l = UFO.optAtt.length;
			for (var i = 0; i < _l; i++) {
				if (typeof _fo[UFO.optAtt[i]] != "undefined") _objAtt += ' ' + UFO.optAtt[i] + '="' + _fo[UFO.optAtt[i]] + '"';
			}
			var _objPar = "";
			var _l = UFO.opt.length;
			for (var i = 0; i < _l; i++) {
				if (typeof _fo[UFO.opt[i]] != "undefined") _objPar += '<param name="' + UFO.opt[i] + '" value="' + _fo[UFO.opt[i]] + '" />';
			}
			var _p = window.location.protocol == "https:" ? "https:" : "http:";
			_e.innerHTML = '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"' + _objAtt + ' width="' + _fo.width + '" height="' + _fo.height + '" codebase="' + _p + '//download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=' + _fo.majorversion + ',0,' + _fo.build + ',0"><param name="movie" value="' + _fo.movie + '" />' + _objPar + '</object>';
		}
	},
		
	createDialog: function(id) {
		var _fo = UFO.foList[id];
		UFO.createCSS("html", "height:100%; overflow:hidden;");
		UFO.createCSS("body", "height:100%; overflow:hidden;");
		UFO.createCSS("#xi-con", "position:absolute; left:0; top:0; z-index:1000; width:100%; height:100%; background-color:#fff; filter:alpha(opacity:75); opacity:0.75;");
		UFO.createCSS("#xi-dia", "position:absolute; left:50%; top:50%; margin-left: -" + Math.round(parseInt(_fo.xiwidth, 10) / 2) + "px; margin-top: -" + Math.round(parseInt(_fo.xiheight, 10) / 2) + "px; width:" + _fo.xiwidth + "px; height:" + _fo.xiheight + "px;");
		var _b = document.getElementsByTagName("body")[0];
		var _c = UFO.createElement("div");
		_c.setAttribute("id", "xi-con");
		var _d = UFO.createElement("div");
		_d.setAttribute("id", "xi-dia");
		_c.appendChild(_d);
		_b.appendChild(_c);
		var _mmu = window.location;
		if (UFO.uaHas("xml") && UFO.uaHas("safari")) {
			var _mmd = document.getElementsByTagName("title")[0].firstChild.nodeValue = document.getElementsByTagName("title")[0].firstChild.nodeValue.slice(0, 47) + " - Flash Player Installation";
		}
		else {
			var _mmd = document.title = document.title.slice(0, 47) + " - Flash Player Installation";
		}
		var _mmp = UFO.pluginType == "ax" ? "ActiveX" : "PlugIn";
		var _uc = typeof _fo.xiurlcancel != "undefined" ? "&xiUrlCancel=" + _fo.xiurlcancel : "";
		var _uf = typeof _fo.xiurlfailed != "undefined" ? "&xiUrlFailed=" + _fo.xiurlfailed : "";
		UFO.foList["xi-dia"] = { movie:_fo.ximovie, width:_fo.xiwidth, height:_fo.xiheight, majorversion:"6", build:"65", flashvars:"MMredirectURL=" + _mmu + "&MMplayerType=" + _mmp + "&MMdoctitle=" + _mmd + _uc + _uf };
		UFO.writeSWF("xi-dia");
	},

	expressInstallCallback: function() {
		var _b = document.getElementsByTagName("body")[0];
		var _c = document.getElementById("xi-con");
		_b.removeChild(_c);
		UFO.createCSS("body", "height:auto; overflow:auto;");
		UFO.createCSS("html", "height:auto; overflow:auto;");
	},

	cleanupIELeaks: function() {
		var _o = document.getElementsByTagName("object");
		var _l = _o.length
		for (var i = 0; i < _l; i++) {
			_o[i].style.display = "none";
			for (var x in _o[i]) {
				if (typeof _o[i][x] == "function") {
					_o[i][x] = null;
				}
			}
		}
	}

};

if (typeof window.attachEvent != "undefined" && UFO.uaHas("ieWin")) {
	window.attachEvent("onunload", UFO.cleanupIELeaks);
}

/*********************************************************
				CORE HELPER FUNCTIONS
*********************************************************/
// replace class of target element
NGS.changeStyleClass = function(cName, target){	
	var element = document.getElementById(target);
	if (element){
		element.className = cName;	
	}
};
// triggers when DOM is ready
// checks browser for DOM functionality
NGS.onload = function(func){	
	// make sure browser supports required DOM methods
	if (document.getElementById)
 	{
		if (typeof window.onload != 'function'){
			window.onload = func;		
		} else {
			window.onload = Delegate.create(this, NGS.windowLoaded, func, window.onload);
		}
	}
};
NGS.windowLoaded = function(obj, func, oldonload){	
	if (oldonload) {
		oldonload();
		func();
	}
};
// common delegate function
function Delegate() {}
Delegate.create = function (o, f) {
	var a = new Array() ;
	var l = arguments.length ;
	for(var i = 2 ; i < l ; i++) a[i - 2] = arguments[i] ;
	return function() {
		var aP = [].concat(arguments, a) ;
		f.apply(o, aP);
	}
};