var simpleGallery_navpanel={
 panel: {height:'0px', opacity:0, paddingTop:'5px', fontStyle:'bold 11px Verdana'},//customize nav panel container
 images: [ '', '', '', ''], //nav panel images (in that order)
 imageSpacing: {offsetTop:[-4, 0, -4], spacing:10}, //top offset of left, play, and right images, PLUS spacing between the 3 images
 slideduration: 500 //duration of slide up animation to reveal panel
 
}
 
function simpleGallery(settingarg){
 this.setting=settingarg
 settingarg=null
 var setting=this.setting
 setting.panelheight=(parseInt(setting.navpanelheight)>5)? parseInt(setting.navpanelheight) : parseInt(simpleGallery_navpanel.panel.height)
 setting.fadeduration=parseInt(setting.fadeduration)
 setting.curimage=(setting.persist)? simpleGallery.routines.getCookie("gallery-"+setting.wrapperid) : 0
 setting.curimage=setting.curimage || 0 //account for curimage being null if cookie is empty
 setting.ispaused=!setting.autoplay[0] //ispaused reflects current state of gallery, autoplay[0] indicates whether gallery is set to auto play
 setting.currentstep=0 //keep track of # of slides slideshow has gone through
 setting.totalsteps=setting.imagearray.length*setting.autoplay[2] //Total steps limit: # of images x # of user specified cycles
 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(){}
 var preloadimages=[], longestdesc=null //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++){
  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 slideshow=this
 jQuery(document).ready(function($){
  var setting=slideshow.setting
  setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'absolute', visibility:'visible', background:'', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main gallery DIV
  if (setting.$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})
   .appendTo(setting.$wrapperdiv)
  setting.gallerylayers=setting.$gallerylayers.get() //cache stacked DIVs as DOM objects
  setting.navbuttons=simpleGallery.routines.addnavpanel(setting) //get 4 nav buttons DIVs as DOM objects
  if (setting.longestdesc!="") //if at least one slide contains a description (feature is enabled)
   setting.descdiv=simpleGallery.routines.adddescpanel(setting)
  $(setting.navbuttons).filter('img.navimages').css({opacity:0.8})
   .bind('mouseover mouseout', function(e){
    $(this).css({opacity:(e.type=="mouseover")? 1 : 0.8})
   })
   .bind('click', function(e){
    var keyword=e.target.title.toLowerCase()
    slideshow.navigate(keyword) //assign behavior to nav images
   })
  setting.$wrapperdiv.bind('mouseenter', function(){slideshow.showhidenavpanel('hide')})
  setting.$wrapperdiv.bind('mouseleave', function(){slideshow.showhidenavpanel('hide')})
  slideshow.showslide(setting.curimage) //show initial slide
  setting.oninit.call(slideshow) //trigger oninit() event
  $(window).bind('unload', function(){ //clean up and persist
   $(slideshow.setting.navbuttons).unbind()
   if (slideshow.setting.persist) //remember last shown image's index
    simpleGallery.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
     }
    }
    if (slideshow.setting[k].innerHTML) //catch gallerydesctext div
     slideshow.setting[k].innerHTML=null
    slideshow.setting[k]=null
   })
   slideshow=slideshow.setting=null
  })
 })
}
 
simpleGallery.prototype={
 
 navigate:function(keyword){
  clearTimeout(this.setting.playtimer)
  this.setting.totalsteps=100000 //if any of the nav buttons are clicked on, set totalsteps limit to an "unreachable" number 
  if (!isNaN(parseInt(keyword))){
   this.showslide(parseInt(keyword))
  }
  else if (/(prev)|(next)/i.test(keyword)){
   this.showslide(keyword.toLowerCase())
  }
  else{ //if play|pause button
   var slideshow=this
   var $playbutton=$(this.setting.navbuttons).eq(1)
   if (!this.setting.ispaused){ //if pause Gallery
    this.setting.autoplay[0]=false
    $playbutton.attr({title:'Play', src:simpleGallery_navpanel.images[1]})
   }
   else if (this.setting.ispaused){ //if play Gallery
    this.setting.autoplay[0]=true
    this.setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, this.setting.autoplay[1])
    $playbutton.attr({title:'Pause', src:simpleGallery_navpanel.images[3]})
   }
   slideshow.setting.ispaused=!slideshow.setting.ispaused
  }
 },
 
 showslide:function(keyword){
  var slideshow=this
  var setting=slideshow.setting
  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)
  setting.gallerylayers[setting.bglayer].innerHTML=simpleGallery.routines.getSlideHTML(setting.imagearray[imgindex])
  setting.$gallerylayers.eq(setting.bglayer).css({zIndex:1000, opacity:0}) //background layer becomes foreground
   .stop().css({opacity:0}).animate({opacity:1}, setting.fadeduration, function(){ //Callback function after fade animation is complete:
    clearTimeout(setting.playtimer)
    setting.gallerylayers[setting.bglayer].innerHTML=null  //empty bglayer (previously fglayer before setting.fglayer=setting.bglayer was set below)
    try{
     setting.onslide.call(slideshow, setting.gallerylayers[setting.fglayer], setting.curimage)
    }catch(e){
     alert("Simple Controls Gallery: An error has occured somwhere in your code attached to the \"onslide\" event: "+e)
    }
    setting.currentstep+=1
    if (setting.autoplay[0]){
     if (setting.currentstep<=setting.totalsteps)
      setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.autoplay[1])
     else
      slideshow.navigate("play/pause")
    }
   }) //end callback function
  setting.gallerylayers[setting.fglayer].style.zIndex=999 //foreground layer becomes background
  setting.fglayer=setting.bglayer
  setting.bglayer=(setting.bglayer==0)? 1 : 0
  setting.curimage=imgindex
  setting.navbuttons[3].innerHTML=(setting.curimage+1) + '/' + setting.imagearray.length
  if (setting.imagearray[imgindex][3]){ //if this slide contains a description
   setting.$descpanel.css({visibility:'visible'})
   setting.descdiv.innerHTML=setting.imagearray[imgindex][3]
  }
  else if (setting.longestdesc!=""){ //if at least one slide contains a description (feature is enabled)
   setting.descdiv.innerHTML=null
   setting.$descpanel.css({visibility:'visible'})
 
  }
 },
 
 showhidenavpanel:function(state){
  var setting=this.setting
  var endpoint=(state=="show")? setting.dimensions[1]-setting.panelheight : this.setting.dimensions[1]
  setting.$navpanel.stop().animate({top:endpoint}, simpleGallery_navpanel.slideduration)
  if (setting.longestdesc!="") //if at least one slide contains a description (feature is enabled)
   this.showhidedescpanel(state)
 },
 
 showhidedescpanel:function(state){
  var setting=this.setting
  var endpoint=(state=="show")? 0 : -setting.descpanelheight
  setting.$descpanel.stop().animate({top:endpoint}, simpleGallery_navpanel.slideduration)
 }
}
 
simpleGallery.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" />'
  layerHTML+=(imgelement[1])? '</a>' : ''
  return layerHTML //return HTML for this layer
 },
 
 addnavpanel:function(setting){
  var interfaceHTML=''
  for (var i=0; i<3; i++){
   var imgstyle='position:relative; border:0; cursor:hand; cursor:pointer; top:'+simpleGallery_navpanel.imageSpacing.offsetTop[i]+'px; margin-right:'+(i!=2? simpleGallery_navpanel.imageSpacing.spacing+'px' : 0)
   var title=(i==0? 'Prev' : (i==1)? (setting.ispaused? 'Play' : 'Pause') : 'Next')
   var imagesrc=(i==1)? simpleGallery_navpanel.images[(setting.ispaused)? 1 : 3] : simpleGallery_navpanel.images[i]
   interfaceHTML+='<img class="navimages" title="' + title + '" src="'+ imagesrc +'" style="'+imgstyle+'" /> '
  }
  interfaceHTML+='<div class="gallerystatus" style="margin-top:1px">' + (setting.curimage+1) + '/' + setting.imagearray.length + '</div>'
  setting.$navpanel=$('<div class="navpanellayer"></div>')
   .css({position:'absolute', width:'100%', height:setting.panelheight, left:0, top:setting.dimensions[1], font:simpleGallery_navpanel.panel.fontStyle, zIndex:'1001'})
   .appendTo(setting.$wrapperdiv)
  $('<div class="navpanelbg"></div><div class="navpanelfg"></div>') //create inner nav panel DIVs
   .css({position:'absolute', left:0, top:0, width:'100%', height:'100%'})
   .eq(0).css({background:'black', opacity:simpleGallery_navpanel.panel.opacity}).end() //"navpanelbg" div
   .eq(1).css({paddingTop:simpleGallery_navpanel.panel.paddingTop, textAlign:'center', color:'#dccb07'}).html(interfaceHTML).end() //"navpanelfg" div
   .appendTo(setting.$navpanel)
  return setting.$navpanel.find('img.navimages, div.gallerystatus').get() //return 4 nav related images and DIVs as DOM objects
 },
 
 adddescpanel:function(setting){
  setting.$descpanel=$('<div class="gallerydesc"><div class="gallerydescbg"></div><div class="gallerydescfg"><div class="gallerydesctext"></div></div></div>')
   .css({position:'absolute', width:'100%', left:0, top:-1000, zIndex:'1001'})
   .find('div').css({position:'absolute', left:0, top:0, width:'100%'})
   .eq(0).css({background:'', opacity:simpleGallery_navpanel.panel.opacity}).end() //"gallerydescbg" div
   .eq(1).css({color:'#dccb07'}).end() //"gallerydescfg" div
   .eq(2).html(setting.longestdesc).end().end()
   .appendTo(setting.$wrapperdiv)
  var $gallerydesctext=setting.$descpanel.find('div.gallerydesctext')
  setting.descpanelheight=$gallerydesctext.outerHeight()
  setting.$descpanel.css({top:-setting.descpanelheight, height:setting.descpanelheight}).find('div').css({height:'100%'})
  return setting.$descpanel.find('div.gallerydesctext').get(0) //return gallery description DIV as a DOM object
 },
 
 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=/"
 }
}