/*
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;
var showLightBoxOnLoad;
var isTenReg;

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

//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");
        if (isTenReg == true) {
            // this shows the "live real time flash" on the tenants register
            displayFlashflLiveRealTime = true;
            showFlashflLiveRealTime();
        }
    }
}

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

// 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]);
    }

    if (showLightBoxOnLoad) {
        valid.displayLightbox("block");
    }
}

// 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);
}