/* 
========================================================================================================= CREDITS
Copyright 	: Copyright (c) 2008 JPL & JERRDAN. All Rights Reserved.
Author(s) 	: Larry Daughenbaugh - ldaugh@jplcreative.com 
Date    	: 10/23/2008 
Notes     	: JavaScript file for handling various events ... onLoad, onClick, etc
            : Based off of a script created by Chris Campbell - http://particletree.com
            : Based off of an adapted script created by  Simon de Haan - http://blog.eight.nl
========================================================================================================= CHANGE LOG
Date		Name			Desc
---			---				---
02/23/2009	Jamy Kunjappu 	Tweaked for JERRDAN Modal
========================================================================================================= BEGIN JAVASCRIPT
*/
var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

// identify lbOn links and load lightbox on document.load (additional functionality)
var valid = [];
/*-----------------------------------------------------------------------------------------------*/

//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');
		}
		
        // ==============================================================================================
        // loop through all lightboxes/modals and set the appropriate heights and margins
        var i = 0;
        var lightbox = document.getElementById("lightbox"+i);
		var divIEheightAdjust = 0;
		var divIEwidthAdjust = 0;
        
		while (lightbox) {
            if (lightbox != null) {
                // set visibility to hidden so we can't see it once we set it's display type to block
                lightbox.style.visibility = "hidden";
                lightbox.style.display = "block";

                // with its display type as "block" we can get its width/height values
				var divHeight = lightbox.offsetHeight;
				var divWidth = lightbox.offsetWidth;
				
				// if IE we subtract any combined padding/border from the height so that we aren't left w/ extra padding
				if (browser == 'Internet Explorer' || browser == 'Opera') {
					divHeight = divHeight - divIEheightAdjust;
					divWidth = divWidth - divIEwidthAdjust;
				}

                if (divHeight > 0) {
                    lightbox.style.height = divHeight;
                    lightbox.style.marginTop = "-" + Math.ceil(divHeight / 2) + "px";
                }
                if (divWidth > 0) {
                    lightbox.style.width = divWidth;
                    lightbox.style.marginLeft = "-" + Math.ceil(divWidth / 2) + "px";
                }
                // reset the visitbility and display styles so it works correctly as a lightbox/modal
                lightbox.style.visibility = "";
                lightbox.style.display = "none";
            }
		    i++;
            lightbox = document.getElementById("lightbox"+i);
		}
        // ==============================================================================================
		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;
  
		/*
		HIDDEN: This truncates the vertical content thus hiding the scrollbar area 
		        in IE which shifts the page over 15-20 pixels, which is undesirable.
		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();
	var lbox = document.getElementsByClassName('lbOn');
	for(i = 0; i < lbox.length; i++) {
		valid[i] = 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);
}