/***********************************************
* DD Drop Down Panel- (c) Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for this script and 100s more
***********************************************/

//** DD Drop Down Panel- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Oct 21st, 08'- Script created
//** Feb, 09' - Script modified by Samuel Malarik for PlancheContact SARL

function ddpanel(setting){
	setting.dir="up" //initial state of panel (up="contracted")
	//if (setting.stateconfig.persiststate && ddpanel.getCookie(setting.ids[0])=="down"){
	if (setting.stateconfig.persiststate){
		setting.dir="down"
	}
	if (setting.dir=="up"){ //if "up", output CSS to hide panel contents
		document.write('<style type="text/css">\n')
		document.write('#'+setting.ids[1]+'{height:' + parseInt(setting.stateconfig.initial) + 'px; overflow:hidden}\n')
		document.write('</style>\n')
	}
	setting.stateconfig.initial=parseInt(setting.stateconfig.initial)
	this.setting=setting
	var thispanel=this
	if (window.addEventListener) //if non IE browsers, initialize panel window.onload
		ddpanel.addEvent(window, function(e){thispanel.initpanel(setting)}, "load")
	else //else if IE, add 100 millisec after window.onload before initializing
		ddpanel.addEvent(window, function(e){setTimeout(function(){thispanel.initpanel(setting)}, 100)}, "load")
	ddpanel.addEvent(window, function(e){thispanel.uninit(setting)}, "unload")
}

ddpanel.events_array=[] //object array to contain events created by script

ddpanel.addEvent=function(target, functionref, tasktype){
	var evtmodel=target.addEventListener? "w3c" : "ie"
	var evtaction=evtmodel=="w3c"? "addEventListener" : "attachEvent"
	var i=this.events_array.push({ //store event info in ddpanel.events_array[] and return current event's index within array
		target: target,
		tasktype: (evtmodel=="ie"? "on" : "")+tasktype,
		listener: evtmodel=="ie"? function(){return functionref.call(target, window.event)} : functionref
	})-1
	target[evtaction](this.events_array[i].tasktype, this.events_array[i].listener, evtmodel=="w3c"? false : null)
}

ddpanel.removeEvent=function(target, functionref, tasktype){
	var evtmodel=target.removeEventListener? "w3c" : "ie"
	var evtaction=evtmodel=="w3c"? "removeEventListener" : "detachEvent"
	target[evtaction](tasktype, functionref, evtmodel=="w3c"? false : null)
}

/*
ddpanel.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
}

ddpanel.setCookie=function(name, value){
	document.cookie = name+"=" + value + ";path=/"
}
*/

ddpanel.addpointer=function(target, className, imagesrc){
	var pointer=document.createElement("img")
	pointer.src=imagesrc
	pointer.className=className
	pointer.style.borderWidth=0
	target.appendChild(pointer)
	return pointer
}

ddpanel.prototype={

	togglepanel:function(dir){ //public function that toggles the panel's state. Optional dir parameter ("up" or "down") to explicitly set state.
		var setting=this.setting
		setting.dir=dir || ((setting.dir=="up")? "down" : "up")
		var pcontent=setting.pcontent, dir=setting.dir
		pcontent._currentheight=(dir=="down")? pcontent._actualheight : setting.stateconfig.initial
		pcontent.style.height=pcontent._currentheight+"px"
		if (setting.pointerimage.enabled){
			setting.arrow.src=setting.pointerimage.src[(setting.dir=="down")? 1 : 0]
			setting.arrow.style.visibility="visible"
		}
		//ddpanel.setCookie(setting.ids[0], setting.dir)
	},
	
	togglepanelplus:function(dir){ //public function that toggles the panel's state w/ animation. Optional dir parameter ("up" or "down") to explicitly set state.
		var setting=this.setting
		setting.dir=dir || ((setting.dir=="up")? "down" : "up")
		if (setting.pointerimage.enabled)
			setting.arrow.style.visibility="hidden"
		clearTimeout(setting.revealtimer)
		this.revealcontent()
	},
	
	revealcontent:function(){
	
		var setting=this.setting
		var pcontent=setting.pcontent, curH=pcontent._currentheight, maxH=pcontent._actualheight, minH=setting.stateconfig.initial, steps=setting.animate.steps, dir=setting.dir
		if (dir=="down" && curH<maxH || dir=="up" && curH>minH){
			var newH = curH + (Math.round((maxH-curH)/steps)+1) * (dir=="up"? -1 : 1)
			newH=(dir=="down")? Math.min(maxH, newH) : Math.max(minH, newH)
			pcontent.style.height=newH+"px"
			pcontent._currentheight=newH
		}
		else{
			if (setting.pointerimage.enabled){
				setting.arrow.src=setting.pointerimage.src[(setting.dir=="down")? 1 : 0]
				setting.arrow.style.visibility="visible"
			}
			return
		}
		var thispanel=this
		setting.revealtimer=setTimeout(function(){thispanel.revealcontent()}, 10)
	},
	
	initpanel:function(){
		var setting=this.setting
		var pcontainer=setting.pcontainer=document.getElementById(setting.ids[0])
		var pcontent=setting.pcontent=document.getElementById(setting.ids[1])
		var tdiv=setting.tdiv=document.getElementById(setting.ids[2])
		pcontent.style.overflow="scroll"
		pcontent._actualheight=pcontent.scrollHeight
		setTimeout(function(){pcontent._actualheight=pcontent.scrollHeight}, 100)
		pcontent.style.overflow="hidden"
		pcontent._currentheight=(setting.dir=="down")? pcontent._actualheight : setting.stateconfig.initial
		var thispanel=this
		ddpanel.addEvent(tdiv, function(e){ //assign click behavior when toggle DIV tab is clicked on
			if (setting.animate.enabled)
				thispanel.togglepanelplus()
			else
				thispanel.togglepanel()
			if (e.preventDefault) e.preventDefault()
			return false
		}, "click")
		if (setting.pointerimage.enabled){
			var pointer1=new Image(), pointer2=new Image()
			pointer1.src=setting.pointerimage.src[0]
			pointer2.src=setting.pointerimage.src[1]
			setting.arrow=ddpanel.addpointer(tdiv.getElementsByTagName("span")[0], "pointerimage", setting.pointerimage.src[setting.dir=="down"? 1:0])
		}
		if (setting.closepanelonclick.enabled){ //assign click behavior when panel content is clicked on (links within panel or elements with class "closepanel"
				ddpanel.addEvent(pcontent, function(e){
					var target=e.srcElement || e.target
					if (/(^|\s+)closepanel($|\s+)/.test(target.className) || target.tagName=="A" || (target.parentNode && target.parentNode.tagName=="A")){
						thispanel.togglepanel("up")
					}
				}, "click")
		}
	},
	
	uninit:function(){
		var setting=this.setting
		if (setting.stateconfig.persiststate){
			//ddpanel.setCookie(setting.ids[0], setting.dir)
		}
		for (prop in setting){
			setting[prop]=null
		}
	}

} //end of ddpanel object