function simpleGallery(settingarg){
	this.setting=settingarg
	settingarg=null
	var setting=this.setting
	setting.pause=parseInt(setting.pause)
	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 //ispaused reflects current state of gallery, autoplay indicates whether gallery is set to auto play
	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=[] //temp array to preload images
	for (var i=0; i<setting.imagearray.length; i++){
		preloadimages[i]=new Image()
		preloadimages[i].src=setting.imagearray[i][0]
	}
	var slideshow=this
	jQuery(document).ready(function($){
		var setting=slideshow.setting
                setTimeout(function(){
		setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'WHITE', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main gallery DIV
		if (setting.$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 object
                
                setting.gallerylayers[setting.fglayer].innerHTML=simpleGallery.routines.getSlideHTML(setting.imagearray[setting.imagearray.length-1])

		slideshow.showslide(setting.curimage) //show initial slide

		setting.oninit() //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")
							slideshow.setting[k][i].innerHTML=null
						slideshow.setting[k][i]=null
					}
				}
				slideshow.setting[k]=null
			})
			slideshow=slideshow.setting=null
		})
            }, setting.pause);
	})
}

simpleGallery.prototype={

	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(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)
				}
				if (setting.autoplay){
					setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.pause)
				}
			})
		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
        }
}

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
	},

	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=/"
	}
}