/* Ultimate Fade-in slideshow (v2.4)
 * Last updated: May 24th, 2010. 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
//May 24th, 10' (v2.4): Adds new "peakaboo" option to "descreveal" setting. oninit and onslide event handlers added.
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 = $('#' + setting.wrapperid).css({
                position: 'relative',
                visibility: 'visible',
                background: 'black',
                overflow: 'hidden',
                width: setting.dimensions[0],
                height: setting.dimensions[1]
            }).empty() //main slideshow DIV
            if (setting.$wrapperdiv.length == 0) { //if no wrapper DIV found
                alert("Error: DIV with ID \"" + setting.wrapperid + "\" not found on page.")
                return
            }
            setting.$gallerylayers = $('<div class="gallerylayer"></div><div class="gallerylayer"></div>') //two stacked DIVs to display the actual slide 
            .css({
                position: 'absolute',
                left: 0,
                top: 0,
                width: '100%',
                height: '100%',
                background: '#F0EFEF'
            }).appendTo(setting.$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 != "" && setting.descreveal != "none") { //if at least one slide contains a description (versus feature is enabled but no descriptions defined) and descreveal not explicitly disabled
                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')
                        $(this).css({
                            visibility: 'hidden'
                        })
                    })
                } else if (setting.descreveal == "ondemand") { //display desc panel on demand (mouseover)
                    setting.$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
        })
        $slideimage.css({
            marginTop: (imgdimensions[1] > 0 && imgdimensions[1] < setting.dimensions[1]) ? setting.dimensions[1] / 2 - imgdimensions[1] / 2 : 0
        })
        if (setting.descreveal == "peekaboo" && setting.longestdesc != "") { //if descreveal is set to "peekaboo", make sure description panel is hidden before next slide is shown
            clearTimeout(setting.hidedesctimer) //clear hide desc panel timer
            slideshow.showhidedescpanel('hide', 0) //and hide it immediately
        }
        setting.$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.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage)
            } catch (e) {
                alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: " + e)
            }
            if (setting.descreveal == "peekaboo" && setting.longestdesc != "") {
                slideshow.showhidedescpanel('show')
                setting.hidedesctimer = setTimeout(function () {
                    slideshow.showhidedescpanel('hide')
                }, setting.displaymode.pause - fadeSlideShow_descpanel.slidespeed)
            }
            setting.currentstep += 1
            if (setting.displaymode.type == "auto") {
                if (setting.currentstep <= setting.totalsteps || setting.displaymode.cycles == 0) setting.playtimer = setTimeout(function () {
                    slideshow.showslide('next')
                }, setting.displaymode.pause)
            }
        }) //end callback function
        setting.$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]) //if this slide contains a description
            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, animateduration) {
        var setting = this.setting
        var endpoint = (state == "show") ? setting.dimensions[1] - setting.panelheight : this.setting.dimensions[1]
        setting.$descpanel.stop().animate({
            top: endpoint
        }, (typeof animateduration != "undefined" ? animateduration : fadeSlideShow_descpanel.slidespeed), function () {
            if (setting.descreveal == "always" && state == "hide") setting.$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: 'black',
            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=/"
    }
}

var mygallery = new fadeSlideShow({
    wrapperid: "slideshow",
    //ID of blank DIV on page to house Slideshow
    dimensions: [980, 440],
    //width/height of gallery in pixels. Should reflect dimensions of largest image
    imagearray: [

        ["images/slideshow/tubes10.jpg"],
        ["images/slideshow/tubes9.jpg"]

    ],
    displaymode: {
        type: 'auto',
        pause: 4000,
        cycles: 0,
        wraparound: false
    },
    persist: false,
    //remember last viewed slide and recall within same session?
    fadeduration: 1600,
    //transition duration (milliseconds)
    descreveal: "ondemand",
    togglerid: ""
})