/* 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: [['images/L1.jpg',7,7], ['images/L2.jpg',10,11], ['images/L3.jpg',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:'DimGray', 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:'DimGray'})

			.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:'0px'})

			.eq(0).css({background:'DimGray', 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=/"

	}

}