var stepcarousel={
	ajaxloadingmsg: '<div style="margin: 1em; font-weight: bold"><img src="../images/loading.gif" style="vertical-align: middle" /> Fetching Content. Please wait...</div>', 
	defaultbuttonsfade: 0.4, /*Fade degree for disabled nav buttons (0=completely transparent, 1=completely opaque)*/
	configholder: {},

	getCSSValue:function(val){ /*Returns either 0 (if val contains 'auto') or val as an integer*/
		return (val=="auto")? 0 : parseInt(val)
	},

	getremotepanels:function($, config){ /*function to fetch external page containing the panel DIVs*/
		config.$belt.html(this.ajaxloadingmsg)
		$.ajax({
			url: config.contenttype[1], /*path to external content*/
			async: true,
			error:function(ajaxrequest){
				config.$belt.html('Error fetching content.<br />Server Response: '+ajaxrequest.responseText)
			},
			success:function(content){
				config.$belt.html(content)
				config.$panels=config.$gallery.find('.'+config.panelclass)
				stepcarousel.alignpanels($, config)
			}
		})
	},

	getoffset:function(what, offsettype){
		return (what.offsetParent)? what[offsettype]+this.getoffset(what.offsetParent, offsettype) : what[offsettype]
	},

	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
	},

	fadebuttons:function(config, currentpanel){
		config.$leftnavbutton.fadeTo('fast', currentpanel==0? this.defaultbuttonsfade : 1)
		config.$rightnavbutton.fadeTo('fast', currentpanel==config.lastvisiblepanel? this.defaultbuttonsfade : 1)
	},

	addnavbuttons:function(config, currentpanel){
		config.$leftnavbutton=$('<img src="'+config.defaultbuttons.leftnav[0]+'">').css({zIndex:50, position:'absolute', left:config.offsets.left+config.defaultbuttons.leftnav[1]+'px', top:config.offsets.top+config.defaultbuttons.leftnav[2]+'px', cursor:'hand', cursor:'pointer'}).attr({title:'Back '+config.defaultbuttons.moveby+' panels'}).appendTo('body')
		config.$rightnavbutton=$('<img src="'+config.defaultbuttons.rightnav[0]+'">').css({zIndex:50, position:'absolute', left:config.offsets.left+config.$gallery.get(0).offsetWidth+config.defaultbuttons.rightnav[1]+'px', top:config.offsets.top+config.defaultbuttons.rightnav[2]+'px', cursor:'hand', cursor:'pointer'}).attr({title:'Forward '+config.defaultbuttons.moveby+' panels'}).appendTo('body')
		config.$leftnavbutton.bind('click', function(){ /*assign nav button event handlers*/
			stepcarousel.stepBy(config.galleryid, -config.defaultbuttons.moveby)
		})
		config.$rightnavbutton.bind('click', function(){ /*assign nav button event handlers*/
			stepcarousel.stepBy(config.galleryid, config.defaultbuttons.moveby)
		})
		if (config.panelbehavior.wraparound==false){ /*if carousel viewer should stop at first or last panel (instead of wrap back or forth)*/
			this.fadebuttons(config, currentpanel)
		}
		return config.$leftnavbutton.add(config.$rightnavbutton)
	},

	stopautostep:function(config){
		clearTimeout(config.steptimer)
		clearTimeout(config.resumeautostep)
	},

	alignpanels:function($, config){
		var paneloffset=0
		config.paneloffsets=[paneloffset] /*array to store upper left offset of each panel (1st element=0)*/
		config.panelwidths=[] /*array to store widths of each panel*/
		config.$panels.each(function(index){ /*loop through panels*/
			var $currentpanel=$(this)
			$currentpanel.css({float: 'none', position: 'absolute', left: paneloffset+'px'}) /*position panel*/
			$currentpanel.bind('click', function(e){return config.onpanelclick(e.target)}) /*bind onpanelclick() to onclick event*/
			paneloffset+=stepcarousel.getCSSValue($currentpanel.css('marginRight')) + parseInt($currentpanel.get(0).offsetWidth || $currentpanel.css('width')) /*calculate next panel offset*/
			config.paneloffsets.push(paneloffset) /*remember this offset*/
			config.panelwidths.push(paneloffset-config.paneloffsets[config.paneloffsets.length-2]) /*remember panel width*/
		})
		config.paneloffsets.pop() /*delete last offset (redundant)*/
		var addpanelwidths=0
		var lastpanelindex=config.$panels.length-1
		config.lastvisiblepanel=lastpanelindex
		for (var i=config.$panels.length-1; i>=0; i--){
			addpanelwidths+=(i==lastpanelindex? config.panelwidths[lastpanelindex] : config.paneloffsets[i+1]-config.paneloffsets[i])
			if (config.gallerywidth>addpanelwidths){
				config.lastvisiblepanel=i /*calculate index of panel that when in 1st position reveals the very last panel all at once based on gallery width*/
			}
		}
		config.$belt.css({width: paneloffset+'px'}) /*Set Belt DIV to total panels' widths*/
		config.currentpanel=(config.panelbehavior.persist)? parseInt(this.getCookie(window[config.galleryid+"persist"])) : 0 /*determine 1st panel to show by default*/
		config.currentpanel=(typeof config.currentpanel=="number" && config.currentpanel<config.$panels.length)? config.currentpanel : 0
		if (config.currentpanel!=0){
			var endpoint=config.paneloffsets[config.currentpanel]+(config.currentpanel==0? 0 : config.beltoffset)
			config.$belt.css({left: -endpoint+'px'})
		}
		if (config.defaultbuttons.enable==true){ /*if enable default back/forth nav buttons*/
			var $navbuttons=this.addnavbuttons(config, config.currentpanel)
			$(window).bind("load resize", function(){ /*refresh position of nav buttons when page loads/resizes, in case offsets weren't available document.oncontentload*/
				config.offsets={left:stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"), top:stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")}
				config.$leftnavbutton.css({left:config.offsets.left+config.defaultbuttons.leftnav[1]+'px', top:config.offsets.top+config.defaultbuttons.leftnav[2]+'px'})
				config.$rightnavbutton.css({left:config.offsets.left+config.$gallery.get(0).offsetWidth+config.defaultbuttons.rightnav[1]+'px', top:config.offsets.top+config.defaultbuttons.rightnav[2]+'px'})
			})
		}
		if (config.autostep && config.autostep.enable){ /*enable auto stepping of Carousel?*/		
			var $carouselparts=config.$gallery.add(typeof $navbuttons!="undefined"? $navbuttons : null)
			$carouselparts.bind('click', function(){
				stepcarousel.stopautostep(config)
				config.autostep.status="stopped"
			})
			$carouselparts.hover(function(){ /*onMouseover*/
				stepcarousel.stopautostep(config)
				config.autostep.hoverstate="over"
			}, function(){ /*onMouseout*/
				if (config.steptimer && config.autostep.hoverstate=="over" && config.autostep.status!="stopped"){
					config.resumeautostep=setTimeout(function(){
						stepcarousel.autorotate(config.galleryid)
						config.autostep.hoverstate="out"
					}, 500)
				}
			})
			config.steptimer=setTimeout(function(){stepcarousel.autorotate(config.galleryid)}, config.autostep.pause) /*automatically rotate Carousel Viewer*/
		} /*end enable auto stepping check*/
		this.statusreport(config.galleryid)
		config.oninit()
		config.onslideaction(this)
	},

	stepTo:function(galleryid, pindex){ /*User entered pindex starts at 1 for intuitiveness. Internally pindex still starts at 0 */
		var config=stepcarousel.configholder[galleryid]
		if (typeof config=="undefined"){
			alert("There's an error with your set up of Carousel Viewer \""+galleryid+ "\"!")
			return
		}
		stepcarousel.stopautostep(config)
		var pindex=Math.min(pindex-1, config.paneloffsets.length-1)
		var endpoint=config.paneloffsets[pindex]+(pindex==0? 0 : config.beltoffset)
		if (config.panelbehavior.wraparound==false && config.defaultbuttons.enable==true){ /*if carousel viewer should stop at first or last panel (instead of wrap back or forth)*/
			this.fadebuttons(config, pindex)
		}
		config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)})
		config.currentpanel=pindex
		this.statusreport(galleryid)
	},

	stepBy:function(galleryid, steps){ /*isauto if defined indicates stepBy() is being called automatically*/
		var config=stepcarousel.configholder[galleryid]
		if (typeof config=="undefined"){
			alert("There's an error with your set up of Carousel Viewer \""+galleryid+ "\"!")
			return
		}
		stepcarousel.stopautostep(config)
		var direction=(steps>0)? 'forward' : 'back' /*If "steps" is negative, that means backwards*/
		var pindex=config.currentpanel+steps /*index of panel to stop at*/
		if (config.panelbehavior.wraparound==false){ /*if carousel viewer should stop at first or last panel (instead of wrap back or forth)*/
			pindex=(direction=="back" && pindex<=0)? 0 : (direction=="forward")? Math.min(pindex, config.lastvisiblepanel) : pindex
			if (config.defaultbuttons.enable==true){ /*if default nav buttons are enabled, fade them in and out depending on if at start or end of carousel*/
				stepcarousel.fadebuttons(config, pindex)
			}	
		}
		else{ /*else, for normal stepBy behavior*/
			if (pindex>config.lastvisiblepanel && direction=="forward"){
				/*if destination pindex is greater than last visible panel, yet we're currently not at the end of the carousel yet*/
				pindex=(config.currentpanel<config.lastvisiblepanel)? config.lastvisiblepanel : 0
			}
			else if (pindex<0 && direction=="back"){
				/*if destination pindex is less than 0, yet we're currently not at the beginning of the carousel yet*/
				pindex=(config.currentpanel>0)? 0 : config.lastvisiblepanel /*wrap around left*/
			}
		}
		var endpoint=config.paneloffsets[pindex]+(pindex==0? 0 : config.beltoffset) /*left distance for Belt DIV to travel to*/
		if (pindex==0 && direction=='forward' || config.currentpanel==0 && direction=='back' && config.panelbehavior.wraparound==true){ /*decide whether to apply "push pull" effect*/
			config.$belt.animate({left: -config.paneloffsets[config.currentpanel]-(direction=='forward'? 100 : -30)+'px'}, 'normal', function(){
				config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)})
			})
		}
		else
			config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)})
		config.currentpanel=pindex
		this.statusreport(galleryid)
	},

	autorotate:function(galleryid){
		var config=stepcarousel.configholder[galleryid]
		if (config.$gallery.attr('_ismouseover')!="yes"){
			this.stepBy(galleryid, config.autostep.moveby)
		}
		config.steptimer=setTimeout(function(){stepcarousel.autorotate(galleryid)}, config.autostep.pause)
	},

	statusreport:function(galleryid){
		var config=stepcarousel.configholder[galleryid]
		var startpoint=config.currentpanel /*index of first visible panel */
		var visiblewidth=0
		for (var endpoint=startpoint; endpoint<config.paneloffsets.length; endpoint++){ /*index (endpoint) of last visible panel*/
			visiblewidth+=config.panelwidths[endpoint]
			if (visiblewidth>config.gallerywidth){
				break
			}
		}
		startpoint+=1 /*format startpoint for user friendiness*/
		endpoint=(endpoint+1==startpoint)? startpoint : endpoint /*If only one image visible on the screen and partially hidden, set endpoint to startpoint*/
		var valuearray=[startpoint, endpoint, config.panelwidths.length]
		for (var i=0; i<config.statusvars.length; i++){
			window[config.statusvars[i]]=valuearray[i] /*Define variable (with user specified name) and set to one of the status values*/
			config.$statusobjs[i].text(valuearray[i]+" ") /*Populate element on page with ID="user specified name" with one of the status values*/
			
		}
		/*$(".StepCarouselButton").removeClass("StepCarouselCurrent");
		$($(".StepCarouselButton")[valuearray[0]-1]).addClass("StepCarouselCurrent");*/
	},

	setup:function(config){
		/*Disable Step Gallery scrollbars ASAP dynamically (enabled for sake of users with JS disabled)*/
		document.write('<style type="text/css">\n#'+config.galleryid+'{overflow: hidden;}\n</style>')

		jQuery(document).ready(function($){
	   if(!document.getElementById(config.galleryid.toString())) {
		  return false;
		}

			config.$gallery=$('#'+config.galleryid)
			config.gallerywidth=config.$gallery.width()
			config.offsets={left:stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"), top:stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")}
			config.$belt=config.$gallery.find('.'+config.beltclass) /*Find Belt DIV that contains all the panels*/
			config.$panels=config.$gallery.find('.'+config.panelclass) /*Find Panel DIVs that each contain a slide*/
			config.panelbehavior.wraparound=(config.autostep && config.autostep.enable)? true : config.panelbehavior.wraparound /*if auto step enabled, set "wraparound" to true*/
			config.onpanelclick=(typeof config.onpanelclick=="undefined")? function(target){} : config.onpanelclick /*attach custom "onpanelclick" event handler*/
			config.onslideaction=(typeof config.onslide=="undefined")? function(){} : function(beltobj){$(beltobj).stop(); config.onslide()} /*attach custom "onslide" event handler*/
			config.oninit=(typeof config.oninit=="undefined")? function(){} : config.oninit /*attach custom "oninit" event handler*/
			config.beltoffset=stepcarousel.getCSSValue(config.$belt.css('marginLeft')) /*Find length of Belt DIV's left margin*/
			config.statusvars=config.statusvars || []  /*get variable names that will hold "start", "end", and "total" slides info*/
			config.$statusobjs=[$('#'+config.statusvars[0]), $('#'+config.statusvars[1]), $('#'+config.statusvars[2])]
			config.currentpanel=0
			stepcarousel.configholder[config.galleryid]=config /*store config parameter as a variable*/
			if (config.contenttype[0]=="ajax" && typeof config.contenttype[1]!="undefined") /*fetch ajax content?*/
				stepcarousel.getremotepanels($, config)
			else
				stepcarousel.alignpanels($, config) /*align panels and initialize gallery*/
		}) /*end document.ready*/
		jQuery(window).bind('unload', function(){ /*clean up*/
			if (config.panelbehavior.persist){
				stepcarousel.setCookie(window[config.galleryid+"persist"], config.currentpanel)
			}
			jQuery.each(config, function(ai, oi){
				oi=null
			})
			config=null
		})
	}
};

  
 stepcarousel.setup({galleryid: 'slider', beltclass: 'belt', panelclass: 'panel', 
                     autostep: { enable:true, moveby:1, pause:8000 },
							panelbehavior: { speed:500, wraparound:false, persist:true },
			 				defaultbuttons: { enable: false },
							contenttype: ['inline']});