//** Step Carousel Viewer- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ http://www.dynamicdrive.com/dynamicindex4/stepcarousel.htm
//** Usage Terms: http://www.dynamicdrive.com/notice.htm
//** Current version (Sept 29th, 09'): 1.8 See http://www.dynamicdrive.com/dynamicindex4/stepcarouselchangelog.txt for details
jQuery.noConflict()
var stepcarousel={
ajaxloadingmsg: '<div style="margin: 1em; font-weight: bold"><img src="ajaxloadr.gif" style="vertical-align: middle" /> Fetching Content. Please wait...</div>', //customize HTML to show while fetching Ajax content
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)
	if (currentpanel==config.lastvisiblepanel){
	stepcarousel.stopautostep(config)
	}
},
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)
},
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(config.galleryid+"persist")) : 0 //determine 1st panel to show by default
	config.currentpanel=(typeof config.currentpanel=="number" && config.currentpanel<config.$panels.length)? config.currentpanel : 0
	var endpoint=config.paneloffsets[config.currentpanel]+(config.currentpanel==0? 0 : config.beltoffset)
	config.$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(){
		config.autostep.status="stopped"
		stepcarousel.stopautostep(config)
	})
	$carouselparts.hover(function(){ //onMouseover
		stepcarousel.stopautostep(config)
		config.autostep.hoverstate="over"
	}, function(){ //onMouseout
		if (config.steptimer && config.autostep.hoverstate=="over" && config.autostep.status!="stopped"){
		config.steptimer=setInterval(function(){stepcarousel.autorotate(config.galleryid)}, config.autostep.pause)
		config.autostep.hoverstate="out"
		}
	})
	config.steptimer=setInterval(function(){stepcarousel.autorotate(config.galleryid)}, config.autostep.pause) //automatically rotate Carousel Viewer
	} //end enable auto stepping check
	this.createpaginate($, config)
	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.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)})
	config.currentpanel=pindex
	this.statusreport(galleryid)
},
stepBy:function(galleryid, steps, isauto){
	var config=stepcarousel.configholder[galleryid]
	if (typeof config=="undefined"){
	//alert("There's an error with your set up of Carousel Viewer \""+galleryid+ "\"!")
	return
	}
	if (!isauto) //if stepBy() function isn't called by autorotate() function
	stepcarousel.stopautostep(config)
	var direction=(steps>0)? 'forward' : 'back' //If "steps" is negative, that means backwards
	var pindex=config.currentpanel+steps //index of panel to stop at
	if (config.panelbehavior.wraparound==false){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth)
	pindex=(direction=="back" && pindex<=0)? 0 : (direction=="forward")? Math.min(pindex, config.lastvisiblepanel) : pindex
	if (config.defaultbuttons.enable==true){ //if default nav buttons are enabled, fade them in and out depending on if at start or end of carousel
		stepcarousel.fadebuttons(config, pindex)
	}
	}
	else{ //else, for normal stepBy behavior
	if (pindex>config.lastvisiblepanel && direction=="forward"){
		//if destination pindex is greater than last visible panel, yet we're currently not at the end of the carousel yet
		pindex=(config.currentpanel<config.lastvisiblepanel)? config.lastvisiblepanel : 0
	}
	else if (pindex<0 && direction=="back"){
		//if destination pindex is less than 0, yet we're currently not at the beginning of the carousel yet
		pindex=(config.currentpanel>0)? 0 : config.lastvisiblepanel /*wrap around left*/
	}
	}
	var endpoint=config.paneloffsets[pindex]+(pindex==0? 0 : config.beltoffset) //left distance for Belt DIV to travel to
	if (pindex==0 && direction=='forward' || config.currentpanel==0 && direction=='back' && config.panelbehavior.wraparound==true){ //decide whether to apply "push pull" effect
	config.$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]
	this.stepBy(galleryid, config.autostep.moveby, true)
},
stopautostep:function(config){
	clearTimeout(config.steptimer)
},
statusreport:function(galleryid){
	var config=stepcarousel.configholder[galleryid]
	if (config.statusvars.length==3){ //if 3 status vars defined
	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.$statusobjs[i].text(valuearray[i]+" ") //Populate element on page with ID="user specified name" with one of the status values
	}
	}
	stepcarousel.selectpaginate(jQuery, galleryid)
},
createpaginate:function($, config){
	if (config.$paginatediv.length==1){
	var $templateimg=config.$paginatediv.find('img["data-over"]:eq(0)') //reference first matching image on page
	var controlpoints=[], controlsrc=[], imgarray=[], moveby=$templateimg.attr("data-moveby") || 1
	var asize=(moveby==1? 0:1) + Math.floor((config.lastvisiblepanel+1) / moveby) //calculate # of pagination links to create
	var imghtml=$('<div>').append($templateimg.clone()).html() //get HTML of first matching image
	srcs=[$templateimg.attr('src'), $templateimg.attr('data-over'), $templateimg.attr('data-select')] //remember control's over and out, and selected image src
	for (var i=0; i<asize; i++){
		var moveto=Math.min(i*moveby, config.lastvisiblepanel)
		imgarray.push(imghtml.replace(/>$/, ' data-index="'+i+'" data-moveto="'+moveto+'" title="Move to Panel '+(moveto+1)+'">') +'\n')
		controlpoints.push(moveto) //store panel index each control goes to when clicked on
	}
	var $controls=$('<span></span>').replaceAll($templateimg).append(imgarray.join('')).find('img') //replace template link with links and return them
	$controls.css({cursor:'pointer'})
	config.$paginatediv.bind('click', function(e){
		var $target=$(e.target)
		if ($target.is('img') && $target.attr('data-over')){
		stepcarousel.stepTo(config.galleryid, parseInt($target.attr('data-moveto'))+1)
		}
	})
	config.$paginatediv.bind('mouseover mouseout', function(e){
		var $target=$(e.target)
		if ($target.is('img') && $target.attr('data-over')){
		if (parseInt($target.attr('data-index')) != config.pageinfo.curselected) //if this isn't the selected link
			$target.attr('src', srcs[(e.type=="mouseover")? 1 : 0])
		}
	})
	config.pageinfo={controlpoints:controlpoints, $controls:$controls,  srcs:srcs, prevselected:null, curselected:null}
	}
},
selectpaginate:function($, galleryid){
	var config=stepcarousel.configholder[galleryid]
	if (config.$paginatediv.length==1){
	for (var i=0; i<config.pageinfo.controlpoints.length; i++){
		if (config.pageinfo.controlpoints[i] <= config.currentpanel) //find largest control point that's less than or equal to current panel shown
		config.pageinfo.curselected=i
	}
	if (typeof config.pageinfo.prevselected!=null) //deselect previously selected link (if found)
		config.pageinfo.$controls.eq(config.pageinfo.prevselected).attr('src', config.pageinfo.srcs[0])
	config.pageinfo.$controls.eq(config.pageinfo.curselected).attr('src', config.pageinfo.srcs[2]) //select current paginate link
	config.pageinfo.prevselected=config.pageinfo.curselected //set current selected link to previous
	}
},
loadcontent:function(galleryid, url){
	var config=stepcarousel.configholder[galleryid]
	config.contenttype=['ajax', url]
	stepcarousel.stopautostep(config)
	stepcarousel.resetsettings($, config)
	stepcarousel.init(jQuery, config)
},
init:function($, config){
	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.$gallery.find('.'+config.panelclass) //Find Panel DIVs that each contain a slide
	config.$paginatediv=$('#'+config.galleryid+'-paginate') //get pagination DIV (if defined)
	if (config.autostep)
	config.autostep.pause+=config.panelbehavior.speed
	config.onpanelclick=(typeof config.onpanelclick=="undefined")? function(target){} : config.onpanelclick //attach custom "onpanelclick" event handler
	config.onslideaction=(typeof config.onslide=="undefined")? function(){} : function(beltobj){$(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($, config) //align panels and initialize gallery
},
resetsettings:function($, config){
	config.$gallery.unbind()
	config.$belt.stop()
	config.$panels.remove()
	if (config.$leftnavbutton){
	config.$leftnavbutton.remove()
	config.$rightnavbutton.remove()
	}
	if (config.$paginatediv.length==1){
	config.$paginatediv.unbind()
	config.pageinfo.$controls.eq(0).attr('src', config.pageinfo.srcs[0]).removeAttr('data-index').removeAttr('data-moveto').removeAttr('title') //reset first pagination link so it acts as template again
	.end().slice(1).remove() //then remove all but first pagination link
	}
	if (config.autostep)
	config.autostep.status=null
	if (config.panelbehavior.persist){
	stepcarousel.setCookie(window[config.galleryid+"persist"], 0) //set initial panel to 0, overridden w/ current panel if window.unload is invoked
	}
},
setup:function(config){
	//Disable Step Gallery scrollbars ASAP dynamically (enabled for sake of users with JS disabled)
	document.write('<style type="text/css">\n#'+config.galleryid+'{overflow: hidden;}\n</style>')
	jQuery(document).ready(function($){
	config.$gallery=$('#'+config.galleryid)
	stepcarousel.init($, config)
	}) //end document.ready
	jQuery(window).bind('unload', function(){ //clean up on page unload
	stepcarousel.resetsettings($, config)
	if (config.panelbehavior.persist)
		stepcarousel.setCookie(config.galleryid+"persist", config.currentpanel)
	jQuery.each(config, function(ai, oi){
		oi=null
	})
	config=null
	})
}
}