//** accordion content script: by dynamic drive, at http://www.dynamicdrive.com
//** created: jan 7th, 08'

//version 1.3: april 3rd, 08':
//**1) script now no longer conflicts with other js frameworks
//**2) adds custom oninit() and onopenclose() event handlers that fire when accordion content instance has initialized, plus whenever a header is opened/closed
//**3) adds support for expanding header(s) using the url parameter (ie: http://mysite.com/accordion.htm?headerclass=0,1)

//april 9th, 08': fixed "defaultexpanded" setting not working when page first loads

//version 1.4: june 4th, 08':
//**1) added option to activate a header "mouseover" instead of the default "click"
//**2) bug persistence not working when used with jquery 1.2.6

//version 1.5: june 20th, 08':
//**1) adds new "onemustopen:true/false" parameter, which lets you set whether at least one header should be open at all times (so never all closed).
//**2) changed cookie path to site wide for persistence feature
//**3) fixed bug so "expandedindices" parameter in oninit(headers, expandedindices) returns empty array [] instead of [-1] when no expanded headers found

//**1) version 1.5.1: june 27th, 08': fixed "defaultexpanded" setting not working properly when used with jquery 1.2.6

//version 1.6: oct 3rd, 08':
//**1) adds new "mouseoverdelay" param that sets delay before headers are activated when "revealtype" param is set to "mouseover"
//**2) fixed bug with "onemustopen" param not working properly when "revealtype" is set to "click"

//version 1.7: march 24th, 09': adds a 3rd revealtype setting "clickgo", which causes browser to navigate to url specified inside the header after expanding its contents.

//version 1.7.1: may 28th, 09': fixed issue that causes margins/paddings in accordion divs to be lost in ie8


var ddaccordion={
	
	contentclassname:{}, //object to store corresponding contentclass name based on headerclass

	expandone:function(headerclass, selected){ //public function to expand a particular header
		this.toggleone(headerclass, selected, "expand")
	},

	collapseone:function(headerclass, selected){ //public function to collapse a particular header
		this.toggleone(headerclass, selected, "collapse")
	},

	expandall:function(headerclass){ //public function to expand all headers based on their shared css classname
		var $=jquery
		var $headers=$('.'+headerclass)
		$('.'+this.contentclassname[headerclass]+':hidden').each(function(){
			$headers.eq(parseint($(this).attr('contentindex'))).trigger("evt_accordion")
		})
	},

	collapseall:function(headerclass){ //public function to collapse all headers based on their shared css classname
		var $=jquery
		var $headers=$('.'+headerclass)
		$('.'+this.contentclassname[headerclass]+':visible').each(function(){
			$headers.eq(parseint($(this).attr('contentindex'))).trigger("evt_accordion")
		})
	},

	toggleone:function(headerclass, selected, optstate){ //public function to expand/ collapse a particular header
		var $=jquery
		var $targetheader=$('.'+headerclass).eq(selected)
		var $subcontent=$('.'+this.contentclassname[headerclass]).eq(selected)
		if (typeof optstate=="undefined" || optstate=="expand" && $subcontent.is(":hidden") || optstate=="collapse" && $subcontent.is(":visible"))
			$targetheader.trigger("evt_accordion")
	},

	expandit:function($targetheader, $targetcontent, config, useractivated, directclick){
		this.transformheader($targetheader, config, "expand")
		$targetcontent.slidedown(config.animatespeed, function(){
			config.onopenclose($targetheader.get(0), parseint($targetheader.attr('headerindex')), $targetcontent.css('display'), useractivated)
			if (config.postreveal=="gotourl" && directclick){ //if revealtype is "go to header url upon click", and this is a direct click on the header
				var targetlink=($targetheader.is("a"))? $targetheader.get(0) : $targetheader.find('a:eq(0)').get(0)
				if (targetlink) //if this header is a link
					settimeout(function(){location=targetlink.href}, 200) //ignore link target, as window.open(targetlink, targetlink.target) doesn't work in ff if popup blocker enabled
			}
		})
	},

	collapseit:function($targetheader, $targetcontent, config, isuseractivated){
		this.transformheader($targetheader, config, "collapse")
		$targetcontent.slideup(config.animatespeed, function(){config.onopenclose($targetheader.get(0), parseint($targetheader.attr('headerindex')), $targetcontent.css('display'), isuseractivated)})
	},

	transformheader:function($targetheader, config, state){
		$targetheader.addclass((state=="expand")? config.cssclass.expand : config.cssclass.collapse) //alternate btw "expand" and "collapse" css classes
		.removeclass((state=="expand")? config.cssclass.collapse : config.cssclass.expand)
		if (config.htmlsetting.location=='src'){ //change header image (assuming header is an image)?
			$targetheader=($targetheader.is("img"))? $targetheader : $targetheader.find('img').eq(0) //set target to either header itself, or first image within header
			$targetheader.attr('src', (state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse) //change header image
		}
		else if (config.htmlsetting.location=="prefix") //if change "prefix" html, locate dynamically added ".accordprefix" span tag and change it
			$targetheader.find('.accordprefix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)
		else if (config.htmlsetting.location=="suffix")
			$targetheader.find('.accordsuffix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)
	},

	urlparamselect:function(headerclass){
		var result=window.location.search.match(new regexp(headerclass+"=((\\d+)(,(\\d+))*)", "i")) //check for "?headerclass=2,3,4" in url
		if (result!=null)
			result=regexp.$1.split(',')
		return result //returns null, [index], or [index1,index2,etc], where index are the desired selected header indices
	},

	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=/"
	},

	init:function(config){
	document.write('<style type="text/css">\n')
	document.write('.'+config.contentclass+'{display: none}\n') //generate css to hide contents
	document.write('<\/style>')
	jquery(document).ready(function($){
		ddaccordion.urlparamselect(config.headerclass)
		var persistedheaders=ddaccordion.getcookie(config.headerclass)
		ddaccordion.contentclassname[config.headerclass]=config.contentclass //remember contentclass name based on headerclass
		config.cssclass={collapse: config.toggleclass[0], expand: config.toggleclass[1]} //store expand and contract css classes as object properties
		config.revealtype=config.revealtype || "click"
		config.revealtype=config.revealtype.replace(/mouseover/i, "mouseenter")
		if (config.revealtype=="clickgo"){
			config.postreveal="gotourl" //remember added action
			config.revealtype="click" //overwrite revealtype to "click" keyword
		}
		if (typeof config.togglehtml=="undefined")
			config.htmlsetting={location: "none"}
		else
			config.htmlsetting={location: config.togglehtml[0], collapse: config.togglehtml[1], expand: config.togglehtml[2]} //store html settings as object properties
		config.oninit=(typeof config.oninit=="undefined")? function(){} : config.oninit //attach custom "oninit" event handler
		config.onopenclose=(typeof config.onopenclose=="undefined")? function(){} : config.onopenclose //attach custom "onopenclose" event handler
		var lastexpanded={} //object to hold reference to last expanded header and content (jquery objects)
		var expandedindices=ddaccordion.urlparamselect(config.headerclass) || ((config.persiststate && persistedheaders!=null)? persistedheaders : config.defaultexpanded)
		if (typeof expandedindices=='string') //test for string value (exception is config.defaultexpanded, which is an array)
			expandedindices=expandedindices.replace(/c/ig, '').split(',') //transform string value to an array (ie: "c1,c2,c3" becomes [1,2,3]
		var $subcontents=$('.'+config["contentclass"])
		if (expandedindices.length==1 && expandedindices[0]=="-1") //check for expandedindices value of [-1], indicating persistence is on and no content expanded
			expandedindices=[]
		if (config["collapseprev"] && expandedindices.length>1) //only allow one content open?
			expandedindices=[expandedindices.pop()] //return last array element as an array (for sake of jquery.inarray())
		if (config["onemustopen"] && expandedindices.length==0) //if at least one content should be open at all times and none are, open 1st header
			expandedindices=[0]
		$('.'+config["headerclass"]).each(function(index){ //loop through all headers
			if (/(prefix)|(suffix)/i.test(config.htmlsetting.location) && $(this).html()!=""){ //add a span element to header depending on user setting and if header is a container tag
				$('<span class="accordprefix"></span>').prependto(this)
				$('<span class="accordsuffix"></span>').appendto(this)
			}
			$(this).attr('headerindex', index+'h') //store position of this header relative to its peers
			$subcontents.eq(index).attr('contentindex', index+'c') //store position of this content relative to its peers
			var $subcontent=$subcontents.eq(index)
			var needle=(typeof expandedindices[0]=="number")? index : index+'' //check for data type within expandedindices array- index should match that type
			if (jquery.inarray(needle, expandedindices)!=-1){ //check for headers that should be expanded automatically (convert index to string first)
				if (config.animatedefault==false)
					$subcontent.show()
				ddaccordion.expandit($(this), $subcontent, config, false) //last param sets 'isuseractivated' parameter
				lastexpanded={$header:$(this), $content:$subcontent}
			}  //end check
			else{
				$subcontent.hide()
				config.onopenclose($(this).get(0), parseint($(this).attr('headerindex')), $subcontent.css('display'), false) //last boolean value sets 'isuseractivated' parameter
				ddaccordion.transformheader($(this), config, "collapse")
			}
		})
		$('.'+config["headerclass"]).bind("evt_accordion", function(e, isdirectclick){ //assign custom event handler that expands/ contacts a header
				var $subcontent=$subcontents.eq(parseint($(this).attr('headerindex'))) //get subcontent that should be expanded/collapsed
				if ($subcontent.css('display')=="none"){
					ddaccordion.expandit($(this), $subcontent, config, true, isdirectclick) //2nd last param sets 'isuseractivated' parameter
					if (config["collapseprev"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){ //collapse previous content?
						ddaccordion.collapseit(lastexpanded.$header, lastexpanded.$content, config, true) //last boolean value sets 'isuseractivated' parameter
					}
					lastexpanded={$header:$(this), $content:$subcontent}
				}
				else if (!config["onemustopen"] || config["onemustopen"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){
					ddaccordion.collapseit($(this), $subcontent, config, true) //last boolean value sets 'isuseractivated' parameter
				}
 		})
		$('.'+config["headerclass"]).bind(config.revealtype, function(){
			if (config.revealtype=="mouseenter"){
				cleartimeout(config.revealdelay)
				var headerindex=parseint($(this).attr("headerindex"))
				config.revealdelay=settimeout(function(){ddaccordion.expandone(config["headerclass"], headerindex)}, config.mouseoverdelay || 0)
			}
			else{
				$(this).trigger("evt_accordion", [true])
				return false //cancel default click behavior
			}
		})
		$('.'+config["headerclass"]).bind("mouseleave", function(){
			cleartimeout(config.revealdelay)
		})
		config.oninit($('.'+config["headerclass"]).get(), expandedindices)
		$(window).bind('unload', function(){ //clean up and persist on page unload
			$('.'+config["headerclass"]).unbind()
			var expandedindices=[]
			$('.'+config["contentclass"]+":visible").each(function(index){ //get indices of expanded headers
				expandedindices.push($(this).attr('contentindex'))
			})
			if (config.persiststate==true && $('.'+config["headerclass"]).length>0){ //persist state?
				expandedindices=(expandedindices.length==0)? '-1c' : expandedindices //no contents expanded, indicate that with dummy '-1c' value?
				ddaccordion.setcookie(config.headerclass, expandedindices)
			}
		})
	})
	}
}


$(function(){
		$("a").focus(function(){this.blur();});
	})
	ddaccordion.init({
	headerclass: "a_js2",  //标题
	contentclass: "a_txt2", //内容
	revealtype: "click",
	mouseoverdelay: 0, 
	collapseprev: true, 
	defaultexpanded: [99], //默认展开第几个,从0开始
	onemustopen: false, 
	animatedefault: false, 
	persiststate: false, //默认开启：false
 	toggleclass: ["", "a_js2_on"],//点击过后样式 
	togglehtml: ["suffix", ""],  
	oninit:function(headers, expandedindices){ 
	},
	onopenclose:function(header, index, state, isuseractivated){
	}})

$(function(){
		$("a").focus(function(){this.blur();});
	})
	ddaccordion.init({
	headerclass: "div_js",  //标题
	contentclass: "div_txt", //内容
	revealtype: "click",
	mouseoverdelay: 0, 
	collapseprev: true, 
	defaultexpanded: [99], //默认展开第几个,从0开始
	onemustopen: false, 
	animatedefault: false, 
	persiststate: false, //默认开启：false
 	toggleclass: ["", "div_js_on"],//点击过后样式 
	togglehtml: ["suffix", ""],  
	oninit:function(headers, expandedindices){ 
	},
	onopenclose:function(header, index, state, isuseractivated){
	}})