/* Ultimate Fade-in slideshow (v2.1)
* Last updated: Sept 10th, 2009. This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

//Oct 6th, 09' (v2.1): Adds option to randomize display order of images, via new option displaymode.randomize

var fadeSlideShow_descpanel = {
    controls: [['x.png',7,7], ['restore.png',10,11], ['loading.gif',54,55]], //full URL and dimensions of close, restore, and loading images
    fontStyle: 'normal 11px Verdana', //font style for text descriptions
    slidespeed: 200 //speed of description panel animation (in millisec)
}

//No need to edit beyond here...

jQuery.noConflict()

function fadeSlideShow(settingarg)
{
    this.setting = settingarg
    settingarg = null
    var setting = this.setting
    setting.fadeduration = setting.fadeduration ? parseInt(setting.fadeduration) : 500
    setting.curimage = (setting.persist) ? fadeSlideShow.routines.getCookie("gallery-" + setting.wrapperid) : 0
    setting.curimage = setting.curimage || 0 //account for curimage being null if cookie is empty
    setting.currentstep = 0 //keep track of # of slides slideshow has gone through (applicable in displaymode='auto' only)
    setting.totalsteps = setting.imagearray.length * (setting.displaymode.cycles > 0 ? setting.displaymode.cycles : Infinity) //Total steps limit (applicable in displaymode='auto' only w/ cycles>0)
    setting.fglayer = 0,setting.bglayer = 1 //index of active and background layer (switches after each change of slide)
    setting.oninit = setting.oninit || function()
    {
    }
    setting.onslide = setting.onslide || function()
    {
    }
    if (setting.displaymode.randomize) //randomly shuffle order of images?
        setting.imagearray.sort(function()
        {
            return 0.5 - Math.random()
        })
    var preloadimages = [] //preload images
    setting.longestdesc = "" //get longest description of all slides. If no desciptions defined, variable contains ""
    for (var i = 0; i < setting.imagearray.length; i++)
    { //preload images
        preloadimages[i] = new Image()
        preloadimages[i].src = setting.imagearray[i][0]
        if (setting.imagearray[i][3] && setting.imagearray[i][3].length > setting.longestdesc.length)
            setting.longestdesc = setting.imagearray[i][3]
    }
    var closebutt = fadeSlideShow_descpanel.controls[0] //add close button to "desc" panel if descreveal="always"
    setting.closebutton = (setting.descreveal == "always") ? '<img class="close" src="' + closebutt[0] + '" style="float:right;cursor:hand;cursor:pointer;width:' + closebutt[1] + 'px;height:' + closebutt[2] + 'px;margin-left:2px" title="Hide Description" />' : ''
    var slideshow = this
    jQuery(document).ready(function($)
    { //fire on DOM ready
        var setting = slideshow.setting
        var fullhtml = fadeSlideShow.routines.getFullHTML(setting.imagearray) //get full HTML of entire slideshow
        setting.$wrapperdiv = $('#' + setting.wrapperid).css({position:'relative', visibility:'visible', background:'none', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main slideshow DIV
        if (setting.$wrapperdiv.length == 0)
        { //if no wrapper DIV found
            alert("Error: DIV with ID \"" + setting.wrapperid + "\" not found on page.")
            return
        }
        setting.$gallerylayers = $('<div class="gallerylayer"></div><div class="gallerylayer"></div>')//two stacked DIVs to display the actual slide
                .css({position:'absolute', left:0, top:0, width:'100%', height:'100%', background:'none'})
                .appendTo(setting.$wrapperdiv)
        var $loadingimg = $('<img src="' + fadeSlideShow_descpanel.controls[2][0] + '" style="position:absolute;width:' + fadeSlideShow_descpanel.controls[2][1] + ';height:' + fadeSlideShow_descpanel.controls[2][2] + '" />')
                .css({left:setting.dimensions[0] / 2 - fadeSlideShow_descpanel.controls[2][1] / 2, top:setting.dimensions[1] / 2 - fadeSlideShow_descpanel.controls[2][2]})//center loading gif
                .appendTo(setting.$wrapperdiv)
        var $curimage = setting.$gallerylayers.html(fullhtml).find('img').hide().eq(setting.curimage) //prefill both layers with entire slideshow content, hide all images, and return current image
        if (setting.longestdesc != "")
        { //if at least one slide contains a description (feature is enabled)
            fadeSlideShow.routines.adddescpanel($, setting)
            if (setting.descreveal == "always")
            { //position desc panel so it's visible to begin with
                setting.$descpanel.css({top:setting.dimensions[1] - setting.panelheight})
                setting.$descinner.click(function(e)
                { //asign click behavior to "close" icon
                    if (e.target.className == "close")
                    {
                        slideshow.showhidedescpanel('hide')
                    }
                })
                setting.$restorebutton.click(function(e)
                { //asign click behavior to "restore" icon
                    slideshow.showhidedescpanel('show')
                    $(this).css({visibility:'hidden'})
                })
            }
            else
            { //display desc panel on demand (mouseover)
                setting.$wrapperdiv.bind('mouseenter', function()
                {
                    slideshow.showhidedescpanel('show')
                })
                setting.$wrapperdiv.bind('mouseleave', function()
                {
                    slideshow.showhidedescpanel('hide')
                })
            }
        }
        setting.$wrapperdiv.bind('mouseenter', function()
        {
            setting.ismouseover = true
        }) //pause slideshow mouseover
        setting.$wrapperdiv.bind('mouseleave', function()
        {
            setting.ismouseover = false
        })
        if ($curimage.get(0).complete)
        { //accounf for IE not firing image.onload
            $loadingimg.hide()
            slideshow.paginateinit($)
            slideshow.showslide(setting.curimage)
        }
        else
        { //initialize slideshow when first image has fully loaded
            $loadingimg.hide()
            slideshow.paginateinit($)
            $curimage.bind('load', function()
            {
                slideshow.showslide(setting.curimage)
            })
        }
        setting.oninit.call(slideshow) //trigger oninit() event
        $(window).bind('unload', function()
        { //clean up and persist
            if (slideshow.setting.persist) //remember last shown image's index
                fadeSlideShow.routines.setCookie("gallery-" + setting.wrapperid, setting.curimage)
            jQuery.each(slideshow.setting, function(k)
            {
                if (slideshow.setting[k] instanceof Array)
                {
                    for (var i = 0; i < slideshow.setting[k].length; i++)
                    {
                        if (slideshow.setting[k][i].tagName == "DIV") //catches 2 gallerylayer divs, gallerystatus div
                            slideshow.setting[k][i].innerHTML = null
                        slideshow.setting[k][i] = null
                    }
                }
            })
            slideshow = slideshow.setting = null
        })
    })
}

fadeSlideShow.prototype = {

    navigate:function(keyword)
    {
        var setting = this.setting
        clearTimeout(setting.playtimer)
        if (setting.displaymode.type == "auto")
        { //in auto mode
            setting.displaymode.type = "manual" //switch to "manual" mode when nav buttons are clicked on
            setting.displaymode.wraparound = true //set wraparound option to true
        }
        if (!isNaN(parseInt(keyword)))
        { //go to specific slide?
            this.showslide(parseInt(keyword))
        }
        else if (/(prev)|(next)/i.test(keyword))
        { //go back or forth inside slide?
            this.showslide(keyword.toLowerCase())
        }
    },

    showslide:function(keyword)
    {
        var slideshow = this
        var setting = slideshow.setting
        if (setting.displaymode.type == "auto" && setting.ismouseover && setting.currentstep <= setting.totalsteps)
        { //if slideshow in autoplay mode and mouse is over it, pause it
            setting.playtimer = setTimeout(function()
            {
                slideshow.showslide('next')
            }, setting.displaymode.pause)
            return
        }
        var totalimages = setting.imagearray.length
        var imgindex = (keyword == "next") ? (setting.curimage < totalimages - 1 ? setting.curimage + 1 : 0)
                : (keyword == "prev") ? (setting.curimage > 0 ? setting.curimage - 1 : totalimages - 1)
                : Math.min(keyword, totalimages - 1)
        var $slideimage = setting.$gallerylayers.eq(setting.bglayer).find('img').hide().eq(imgindex).show() //hide all images except current one
        var imgdimensions = [$slideimage.width(), $slideimage.height()] //center align image
        $slideimage.css({marginLeft: (imgdimensions[0] > 0 && imgdimensions[0] < setting.dimensions[0]) ? setting.dimensions[0] / 2 - imgdimensions[0] / 2 : 0})
        $slideimage.css({marginTop: (imgdimensions[1] > 0 && imgdimensions[1] < setting.dimensions[1]) ? setting.dimensions[1] / 2 - imgdimensions[1] / 2 : 0})
        setting.$gallerylayers.eq(setting.bglayer).css({zIndex:1000, opacity:0})//background layer becomes foreground
                .stop().css({opacity:0}).animate({opacity:1}, setting.fadeduration, function()
        { //Callback function after fade animation is complete:
            clearTimeout(setting.playtimer)
            try
            {
                setting.onslide.call(slideshow, setting.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage)
            }
            catch(e)
            {
                alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: " + e)
            }
            setting.currentstep += 1
            if (setting.displaymode.type == "auto")
            {
                if (setting.currentstep <= setting.totalsteps || setting.displaymode.cycles == 0)
                    setting.playtimer = setTimeout(function()
                    {
                        slideshow.showslide('next')
                    }, setting.displaymode.pause)
            }
        }) //end callback function
        setting.$gallerylayers.eq(setting.fglayer).css({zIndex:999}) //foreground layer becomes background
        setting.fglayer = setting.bglayer
        setting.bglayer = (setting.bglayer == 0) ? 1 : 0
        setting.curimage = imgindex
        if (setting.$descpanel)
            setting.$descpanel.css({visibility:(setting.imagearray[imgindex][3]) ? 'visible' : 'hidden'})
        if (setting.imagearray[imgindex][3])
            setting.$descinner.empty().html(setting.closebutton + setting.imagearray[imgindex][3])
        if (setting.displaymode.type == "manual" && !setting.displaymode.wraparound)
        {
            this.paginatecontrol()
        }
        if (setting.$status) //if status container defined
            setting.$status.html(setting.curimage + 1 + "/" + totalimages)
    },

    showhidedescpanel:function(state, showcontrol)
    {
        var setting = this.setting
        var endpoint = (state == "show") ? setting.dimensions[1] - setting.panelheight : this.setting.dimensions[1]
        setting.$descpanel.stop().animate({top:endpoint}, fadeSlideShow_descpanel.slidespeed, function()
        {
            if (setting.descreveal == "always" && state == "hide")
                setting.$restorebutton.css({visibility:'visible'}) //show restore button
        })
    },

    paginateinit:function($)
    {
        var slideshow = this
        var setting = this.setting
        if (setting.togglerid)
        { //if toggler div defined
            setting.$togglerdiv = $("#" + setting.togglerid)
            setting.$prev = setting.$togglerdiv.find('.prev').data('action', 'prev')
            setting.$next = setting.$togglerdiv.find('.next').data('action', 'next')
            setting.$prev.add(setting.$next).click(function(e)
            { //assign click behavior to prev and next controls
                var $target = $(this)
                slideshow.navigate($target.data('action'))
                e.preventDefault()
            })
            setting.$status = setting.$togglerdiv.find('.status')
        }
    },

    paginatecontrol:function()
    {
        var setting = this.setting
        setting.$prev.css({opacity:(setting.curimage == 0) ? 0.4 : 1}).data('action', (setting.curimage == 0) ? 'none' : 'prev')
        setting.$next.css({opacity:(setting.curimage == setting.imagearray.length - 1) ? 0.4 : 1}).data('action', (setting.curimage == setting.imagearray.length - 1) ? 'none' : 'next')
        if (document.documentMode == 8)
        { //in IE8 standards mode, apply opacity to inner image of link
            setting.$prev.find('img:eq(0)').css({opacity:(setting.curimage == 0) ? 0.4 : 1})
            setting.$next.find('img:eq(0)').css({opacity:(setting.curimage == setting.imagearray.length - 1) ? 0.4 : 1})
        }
    }


}

fadeSlideShow.routines = {

    getSlideHTML:function(imgelement)
    {
        var layerHTML = (imgelement[1]) ? '<a href="' + imgelement[1] + '" target="' + imgelement[2] + '">\n' : '' //hyperlink slide?
        layerHTML += '<img src="' + imgelement[0] + '" style="border-width:0;" />\n'
        layerHTML += (imgelement[1]) ? '</a>\n' : ''
        return layerHTML //return HTML for this layer
    },

    getFullHTML:function(imagearray)
    {
        var preloadhtml = ''
        for (var i = 0; i < imagearray.length; i++)
            preloadhtml += this.getSlideHTML(imagearray[i])
        return preloadhtml
    },

    adddescpanel:function($, setting)
    {
        setting.$descpanel = $('<div class="fadeslidedescdiv"></div>')
                .css({position:'absolute', visibility:'hidden', width:'100%', left:0, top:setting.dimensions[1], font:fadeSlideShow_descpanel.fontStyle, zIndex:'1001'})
                .appendTo(setting.$wrapperdiv)
        $('<div class="descpanelbg"></div><div class="descpanelfg"></div>')//create inner nav panel DIVs
                .css({position:'absolute', left:0, top:0, width:setting.$descpanel.width() - 8, padding:'4px'})
                .eq(0).css({background:'none', opacity:0.7}).end()//"descpanelbg" div
                .eq(1).css({color:'white'}).html(setting.closebutton + setting.longestdesc).end()//"descpanelfg" div
                .appendTo(setting.$descpanel)
        setting.$descinner = setting.$descpanel.find('div.descpanelfg')
        setting.panelheight = setting.$descinner.outerHeight()
        setting.$descpanel.css({height:setting.panelheight}).find('div').css({height:'100%'})
        if (setting.descreveal == "always")
        { //create restore button
            setting.$restorebutton = $('<img class="restore" title="Restore Description" src="' + fadeSlideShow_descpanel.controls[1][0] + '" style="position:absolute;visibility:hidden;right:0;bottom:0;z-index:1002;width:' + fadeSlideShow_descpanel.controls[1][1] + 'px;height:' + fadeSlideShow_descpanel.controls[1][2] + 'px;cursor:pointer;cursor:hand" />')
                    .appendTo(setting.$wrapperdiv)


        }
    },


    getCookie:function(Name)
    {
        var re = new RegExp(Name + "=[^;]+", "i");
        //construct RE to search for target name/value pair
        if (document.cookie.match(re)) //if cookie found
            return document.cookie.match(re)[0].split("=")[1] //return its value
        return null
    },

    setCookie:function(name, value)
    {
        document.cookie = name + "=" + value + ";path=/"
    }
}