/* Created By: Chris Campbell. http://particletree.com. 2/1/2006
   Inspired by the lightbox implementation found at http://www.huddletogether.com/projects/lightbox/ */

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();

image1 = new Image();
image1.src = "/spinner.gif";

lightbox.prototype = {
	yPos : 0,
	xPos : 0,
	initialize: function(ctrl) {
		if (ctrl!=undefined) {
			this.content = ctrl.href;
			Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
			ctrl.onclick = function(){return false;};
		}
	},
	// Turn everything on - mainly the IE fixes
	activate: function(thetext){
		if (browser == 'Internet Explorer'){
//			this.getScroll();
//			this.prepareIE('100%', 'hidden');
//			this.setScroll(0,0);
			this.hideSelects('hidden');
		}
		centrejobby()
		if (thetext!=undefined) $("lbLoadMessage").innerHTML = "<p>" + thetext + "</p>"
		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;
		$('lightbox').style.display = display;
	},
	deactivate: function(){
		try {Element.remove($('lbContent'));} catch(x) {}
		if (browser == "Internet Explorer"){
			this.hideSelects("visible");
		}
		this.displayLightbox("none");
	}
}

// Onload, make all links that need to trigger a lightbox active
function initialize(){
	addLightboxMarkup()//	lbox = document.getElementsByClassName('lbOn');
}

function addLightboxMarkup() {
	bod 				= document.getElementsByTagName('body')[0];
	overlay 			= document.createElement('div');
	overlay.id		= 'overlay';
	lb					= document.createElement('div');
	lb.id				= 'lightbox';
	lb.className 	= 'loading';
	lb.innerHTML	= '<div id="lbLoadMessage"><p>Please Wait ....</p></div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);

	image1 = new Image();											// ADDED TO PRELOAD THE IMAGE (3RD APRIL 2007)
	image1.src = "/spinner.gif";

	var viewPortHeight = windowState.getFullHeight();
	var divStyleRef = $("overlay").style
	var positionMod = (typeof divStyleRef.height == 'string')?"px":0;
	divStyleRef.height = viewPortHeight + positionMod;
}





var windowState = (function(){										// from http://www.thescripts.com/forum/thread90674.html
	var readScroll = {scrollLeft:0,scrollTop:0};
	var readSize = {clientWidth:0,clientHeight:0};
	var readScrollX = 'scrollLeft';
	var readScrollY = 'scrollTop';
	var readWidth = 'clientWidth';
	var readHeight = 'clientHeight';

	function otherWindowTest(obj){
		if((document.compatMode)&& (document.compatMode == 'CSS1Compat')&& (document.documentElement)){
			return document.documentElement;
		}else if(document.body){
			return document.body;
		}else{
			return obj;
		}
	};
	if((typeof this.innerHeight == 'number')&& (typeof this.innerWidth == 'number')){
		readSize = this;
		readWidth = 'innerWidth';
		readHeight = 'innerHeight';
	}else{
		readSize = otherWindowTest(readSize);
	}
	if((typeof this.pageYOffset == 'number')&& (typeof this.pageXOffset == 'number')){
		readScroll = this;
		readScrollY = 'pageYOffset';
		readScrollX = 'pageXOffset';
	}else{
		readScroll = otherWindowTest(readScroll);
	}
	return {
		getScrollX:function(){ return (readScroll[readScrollX]||0); },
		getScrollY:function(){ return (readScroll[readScrollY]||0);	},
		getWidth:function(){ return (readSize[readWidth]||0); },
		getHeight:function(){ return (readSize[readHeight]||0); },
		getFullHeight:function(){
			var x,y;
			var test1 = document.body.scrollHeight;
			var test2 = document.body.offsetHeight
			if (test1 > test2) // all but Explorer Mac
			{
				x = document.body.scrollWidth;
				y = document.body.scrollHeight;
			}
			else // Explorer Mac;
			{
				x = document.body.offsetWidth;
				y = document.body.offsetHeight;
			}
			return (this.getHeight() > y) ? this.getHeight() : y
		}
	};
})();

function centrejobby() {
	var viewPortHeight = windowState.getHeight();
	var verticalScroll = windowState.getScrollY();
	divHeight=50;
	var vPos = Math.round(verticalScroll+((viewPortHeight-divHeight)/2));
	vPos = (vPos < 0)?0:vPos;
	var divStyleRef = $("lightbox").style
	var positionMod = (typeof divStyleRef.top == 'string')?"px":0;
	divStyleRef.top = vPos + positionMod;
}