function ddpanel(setting){
setting.dir="up"
if (setting.stateconfig.persiststate && ddpanel.getCookie(setting.ids[0])=="down"){
setting.dir="down"
}
if (setting.dir=="up"){
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)
ddpanel.addEvent(window, function(e){thispanel.initpanel(setting)}, "load")
else
ddpanel.addEvent(window, function(e){setTimeout(function(){thispanel.initpanel(setting)}, 100)}, "load")
ddpanel.addEvent(window, function(e){thispanel.uninit(setting)}, "unload")
}
ddpanel.events_array=[]
ddpanel.addEvent=function(target, functionref, tasktype){
var evtmodel=target.addEventListener? "w3c" : "ie"
var evtaction=evtmodel=="w3c"? "addEventListener" : "attachEvent"
var i=this.events_array.push({
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");
if (document.cookie.match(re))
return document.cookie.match(re)[0].split("=")[1]
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){
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){
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){
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){
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
}
}
}
var defaultpanel=new ddpanel({
ids: ["login", "logincontent", "logintab"],
stateconfig: {initial: "0", persiststate: true},
animate: {enabled: true, steps: 100},
pointerimage: {enabled: false, src: ["", ""]},
closepanelonclick: {enabled: true}
})