/* 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], ['js/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=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'white', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main slideshow DIV
          if (setting.$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:'white'})
               .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:'white', opacity:1.0}).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=/"
     }
}