//** 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
			//alert('$divref.animate()');
			$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)
					//alert('togglerimage');
				}
				if (animatedcollapse.ontoggle){
					try{
						animatedcollapse.ontoggle(jQuery, $divref.get(0), $divref.css('display'))
						//alert('animatedcollapse.ontoggle');
					}
					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]
			}
		}
	}
}