//** Animated Collapsible DIV v2.0- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com.

//** May 24th, 08'- Script rewritten and updated to 2.0.

//** June 4th, 08'- Version 2.01: Bug fix to work with jquery 1.2.6 (which changed the way attr() behaves).

//** March 5th, 09'- Version 2.2, which adds the following:

			//1) ontoggle($, divobj, state) event that fires each time a DIV is expanded/collapsed, including when the page 1st loads

			//2) Ability to expand a DIV via a URL parameter string, ie: index.htm?expanddiv=jason or index.htm?expanddiv=jason,kelly



//** March 9th, 09'- Version 2.2.1: Optimized ontoggle event handler slightly.

//** July 3rd, 09'- Version 2.4, which adds the following:

			//1) You can now insert rel="expand[divid] | collapse[divid] | toggle[divid]" inside arbitrary links to act as DIV togglers

			//2) For image toggler links, you can insert the attributes "data-openimage" and "data-closedimage" to update its image based on the DIV state



var animatedcollapse={

divholders: {}, //structure: {div.id, div.attrs, div.$divref, div.$togglerimage}

divgroups: {}, //structure: {groupname.count, groupname.lastactivedivid}

lastactiveingroup: {}, //structure: {lastactivediv.id}

preloadimages: [],



show:function(divids){ //public method

	if (typeof divids=="object"){

		for (var i=0; i<divids.length; i++)

			this.showhide(divids[i], "show")

	}

	else

		this.showhide(divids, "show")

},



hide:function(divids){ //public method

	if (typeof divids=="object"){

		for (var i=0; i<divids.length; i++)

			this.showhide(divids[i], "hide")

	}

	else

		this.showhide(divids, "hide")

},



toggle:function(divid){ //public method

	if (typeof divid=="object")

		divid=divid[0]

	this.showhide(divid, "toggle")

},



addDiv:function(divid, attrstring){ //public function

	this.divholders[divid]=({id: divid, $divref: null, attrs: attrstring})

	this.divholders[divid].getAttr=function(name){ //assign getAttr() function to each divholder object

		var attr=new RegExp(name+"=([^,]+)", "i") //get name/value config pair (ie: width=400px,)

		return (attr.test(this.attrs) && parseInt(RegExp.$1)!=0)? RegExp.$1 : null //return value portion (string), or 0 (false) if none found

	}

	this.currentid=divid //keep track of current div object being manipulated (in the event of chaining)

	return this

},



showhide:function(divid, action){

	var $divref=this.divholders[divid].$divref //reference collapsible DIV

	if (this.divholders[divid] && $divref.length==1){ //if DIV exists

		var targetgroup=this.divgroups[$divref.attr('groupname')] //find out which group DIV belongs to (if any)

		if ($divref.attr('groupname') && targetgroup.count>1 && (action=="show" || action=="toggle" && $divref.css('display')=='none')){ //If current DIV belongs to a group

			if (targetgroup.lastactivedivid && targetgroup.lastactivedivid!=divid) //if last active DIV is set

				this.slideengine(targetgroup.lastactivedivid, 'hide') //hide last active DIV within group first

				this.slideengine(divid, 'show')

			targetgroup.lastactivedivid=divid //remember last active DIV

		}

		else{

			this.slideengine(divid, action)

		}

	}

},



slideengine:function(divid, action){

	var $divref=this.divholders[divid].$divref

	var $togglerimage=this.divholders[divid].$togglerimage

	if (this.divholders[divid] && $divref.length==1){ //if this DIV exists

		var animateSetting={height: action}

		if ($divref.attr('fade'))

			animateSetting.opacity=action

		$divref.animate(animateSetting, $divref.attr('speed')? parseInt($divref.attr('speed')) : 500, function(){

			if ($togglerimage){

				$togglerimage.attr('src', ($divref.css('display')=="none")? $togglerimage.data('srcs').closed : $togglerimage.data('srcs').open)

			}

			if (animatedcollapse.ontoggle){

				try{

					animatedcollapse.ontoggle(jQuery, $divref.get(0), $divref.css('display'))

				}

				catch(e){

					alert("An error exists inside your \"ontoggle\" function:\n\n"+e+"\n\nAborting execution of function.")

				}

			}

		})

		return false

	}

},



generatemap:function(){

	var map={}

	for (var i=0; i<arguments.length; i++){

		if (arguments[i][1]!=null){ //do not generate name/value pair if value is null

			map[arguments[i][0]]=arguments[i][1]

		}

	}

	return map

},



init:function(){

	var ac=this

	jQuery(document).ready(function($){

		animatedcollapse.ontoggle=animatedcollapse.ontoggle || null

		var urlparamopenids=animatedcollapse.urlparamselect() //Get div ids that should be expanded based on the url (['div1','div2',etc])

		var persistopenids=ac.getCookie('acopendivids') //Get list of div ids that should be expanded due to persistence ('div1,div2,etc')

		var groupswithpersist=ac.getCookie('acgroupswithpersist') //Get list of group names that have 1 or more divs with "persist" attribute defined

		if (persistopenids!=null) //if cookie isn't null (is null if first time page loads, and cookie hasnt been set yet)

			persistopenids=(persistopenids=='nada')? [] : persistopenids.split(',') //if no divs are persisted, set to empty array, else, array of div ids

		groupswithpersist=(groupswithpersist==null || groupswithpersist=='nada')? [] : groupswithpersist.split(',') //Get list of groups with divs that are persisted

		jQuery.each(ac.divholders, function(){ //loop through each collapsible DIV object

			this.$divref=$('#'+this.id)

			if ((this.getAttr('persist') || jQuery.inArray(this.getAttr('group'), groupswithpersist)!=-1) && persistopenids!=null){ //if this div carries a user "persist" setting, or belong to a group with at least one div that does

				var cssdisplay=(jQuery.inArray(this.id, persistopenids)!=-1)? 'block' : 'none'

			}

			else{

				var cssdisplay=this.getAttr('hide')? 'none' : null

			}

			if (urlparamopenids[0]=="all" || jQuery.inArray(this.id, urlparamopenids)!=-1){ //if url parameter string contains the single array element "all", or this div's ID

				cssdisplay='block' //set div to "block", overriding any other setting

			}

			else if (urlparamopenids[0]=="none"){

				cssdisplay='none' //set div to "none", overriding any other setting

			}

			this.$divref.css(ac.generatemap(['height', this.getAttr('height')], ['display', cssdisplay]))

			this.$divref.attr(ac.generatemap(['groupname', this.getAttr('group')], ['fade', this.getAttr('fade')], ['speed', this.getAttr('speed')]))

			if (this.getAttr('group')){ //if this DIV has the "group" attr defined

				var targetgroup=ac.divgroups[this.getAttr('group')] || (ac.divgroups[this.getAttr('group')]={}) //Get settings for this group, or if it no settings exist yet, create blank object to store them in

				targetgroup.count=(targetgroup.count||0)+1 //count # of DIVs within this group

				if (jQuery.inArray(this.id, urlparamopenids)!=-1){ //if url parameter string contains this div's ID

					targetgroup.lastactivedivid=this.id //remember this DIV as the last "active" DIV (this DIV will be expanded). Overrides other settings

					targetgroup.overridepersist=1 //Indicate to override persisted div that would have been expanded

				}

				if (!targetgroup.lastactivedivid && this.$divref.css('display')!='none' || cssdisplay=="block" && typeof targetgroup.overridepersist=="undefined") //if this DIV was open by default or should be open due to persistence								

					targetgroup.lastactivedivid=this.id //remember this DIV as the last "active" DIV (this DIV will be expanded)

				this.$divref.css({display:'none'}) //hide any DIV that's part of said group for now

			}

		}) //end divholders.each

		jQuery.each(ac.divgroups, function(){ //loop through each group

			if (this.lastactivedivid && urlparamopenids[0]!="none") //show last "active" DIV within each group (one that should be expanded), unless url param="none"

				ac.divholders[this.lastactivedivid].$divref.show()

		})

		if (animatedcollapse.ontoggle){

			jQuery.each(ac.divholders, function(){ //loop through each collapsible DIV object and fire ontoggle event

				animatedcollapse.ontoggle(jQuery, this.$divref.get(0), this.$divref.css('display'))

			})

		}

 		//Parse page for links containing rel attribute

		var $allcontrols=$('a[rel]').filter('[rel^="collapse["], [rel^="expand["], [rel^="toggle["]') //get all elements on page with rel="collapse[]", "expand[]" and "toggle[]"

		$allcontrols.each(function(){ //loop though each control link

			this._divids=this.getAttribute('rel').replace(/(^\w+)|(\s+)/g, "").replace(/[\[\]']/g, "") //cache value 'div1,div2,etc' within identifier[div1,div2,etc]

			if (this.getElementsByTagName('img').length==1 && ac.divholders[this._divids]){ //if control is an image link that toggles a single DIV (must be one to one to update status image)

				animatedcollapse.preloadimage(this.getAttribute('data-openimage'), this.getAttribute('data-closedimage')) //preload control images (if defined)

				$togglerimage=$(this).find('img').eq(0).data('srcs', {open:this.getAttribute('data-openimage'), closed:this.getAttribute('data-closedimage')}) //remember open and closed images' paths

				ac.divholders[this._divids].$togglerimage=$(this).find('img').eq(0) //save reference to toggler image (to be updated inside slideengine()

				ac.divholders[this._divids].$togglerimage.attr('src', (ac.divholders[this._divids].$divref.css('display')=="none")? $togglerimage.data('srcs').closed : $togglerimage.data('srcs').open)

			}

			$(this).click(function(){ //assign click behavior to each control link

				var relattr=this.getAttribute('rel')

				var divids=(this._divids=="")? [] : this._divids.split(',') //convert 'div1,div2,etc' to array 

				if (divids.length>0){

					animatedcollapse[/expand/i.test(relattr)? 'show' : /collapse/i.test(relattr)? 'hide' : 'toggle'](divids) //call corresponding public function

					return false

				}

			}) //end control.click

		})// end control.each



		$(window).bind('unload', function(){

			ac.uninit()

		})

	}) //end doc.ready()

},



uninit:function(){

	var opendivids='', groupswithpersist=''

	jQuery.each(this.divholders, function(){

		if (this.$divref.css('display')!='none'){

			opendivids+=this.id+',' //store ids of DIVs that are expanded when page unloads: 'div1,div2,etc'

		}

		if (this.getAttr('group') && this.getAttr('persist'))

			groupswithpersist+=this.getAttr('group')+',' //store groups with which at least one DIV has persistance enabled: 'group1,group2,etc'

	})

	opendivids=(opendivids=='')? 'nada' : opendivids.replace(/,$/, '')

	groupswithpersist=(groupswithpersist=='')? 'nada' : groupswithpersist.replace(/,$/, '')

	this.setCookie('acopendivids', opendivids)

	this.setCookie('acgroupswithpersist', groupswithpersist)

},



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, days){

	if (typeof days!="undefined"){ //if set persistent cookie

		var expireDate = new Date()

		expireDate.setDate(expireDate.getDate()+days)

		document.cookie = name+"="+value+"; path=/; expires="+expireDate.toGMTString()

	}

	else //else if this is a session only cookie

		document.cookie = name+"="+value+"; path=/"

},



urlparamselect:function(){

	window.location.search.match(/expanddiv=([\w\-_,]+)/i) //search for expanddiv=divid or divid1,divid2,etc

	return (RegExp.$1!="")? RegExp.$1.split(",") : []

},



preloadimage:function(){

	var preloadimages=this.preloadimages

	for (var i=0; i<arguments.length; i++){

		if (arguments[i] && arguments[i].length>0){

			preloadimages[preloadimages.length]=new Image()

			preloadimages[preloadimages.length-1].src=arguments[i]

		}

	}

}



}