var uniquepageid=window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, "");

function animationscroll(divId, animatetime, persistexpand, initstate){
    this.divId=divId;
    this.divObj=document.getElementById(divId);
    this.divObj.style.overflow="hidden";
    this.timelength=animatetime;
    this.initstate=(typeof initstate!="undefined" && initstate=="block")? "block" : "contract";
    this.isExpanded=animationscroll.getCookie(uniquepageid+"-"+divId);
    this.contentheight=parseInt(this.divObj.style.height);
    var thisobj=this;
    if (isNaN(this.contentheight)){
        animationscroll.dotask(window, function(){thisobj._getheight(persistexpand)}, "load");
        if (!persistexpand && this.initstate=="contract" || persistexpand && this.isExpanded!="yes" && this.isExpanded!="") 
            this.divObj.style.visibility="hidden";
    }
    else if (!persistexpand && this.initstate=="contract" || persistexpand && this.isExpanded!="yes" && this.isExpanded!="")
        this.divObj.style.height=0;
    if (persistexpand)
        animationscroll.dotask(window, function(){animationscroll.setCookie(uniquepageid+"-"+thisobj.divId, thisobj.isExpanded)}, "unload");
}

animationscroll.prototype._getheight=function(persistexpand){
    this.contentheight=this.divObj.offsetHeight;
    if (!persistexpand && this.initstate=="contract" || persistexpand && this.isExpanded!="yes"){
        this.divObj.style.height=0;
        this.divObj.style.visibility="visible";
    }
    else 	
        this.divObj.style.height=this.contentheight+"px";
}

animationscroll.prototype._slideengine=function(direction){
    var elapsed=new Date().getTime()-this.startTime;
    var thisobj=this;
    if (elapsed<this.timelength){
        var distancepercent=(direction=="down")? animationscroll.curveincrement(elapsed/this.timelength) : 1-animationscroll.curveincrement(elapsed/this.timelength);
        this.divObj.style.height=distancepercent * this.contentheight +"px";
        this.runtimer=setTimeout(function(){thisobj._slideengine(direction)}, 10);
    }else{
        this.divObj.style.height=(direction=="down")? this.contentheight+"px" : 0;
        this.isExpanded=(direction=="down")? "yes" : "no";
        this.runtimer=null;
    }
}

animationscroll.prototype.slidedown=function(){
    if (typeof this.runtimer=="undefined" || this.runtimer==null){
        if (isNaN(this.contentheight))
            alert("Please wait until document has fully loaded then click again");
        else if (parseInt(this.divObj.style.height)==0){
            this.startTime=new Date().getTime();
            this._slideengine("down");
        }
    }
}

animationscroll.prototype.slideup=function(){
    if (typeof this.runtimer=="undefined" || this.runtimer==null){
        if (isNaN(this.contentheight))
            alert("Please wait until document has fully loaded then click again");
        else if (parseInt(this.divObj.style.height)==this.contentheight){
            this.startTime=new Date().getTime();
            this._slideengine("up");
        }
    }
}

animationscroll.prototype.slideit=function(){
    if (isNaN(this.contentheight))
        alert("Please wait until document has fully loaded then click again");
    else if (parseInt(this.divObj.style.height)==0)
        this.slidedown();
    else if (parseInt(this.divObj.style.height)==this.contentheight)
        this.slideup();
}

animationscroll.curveincrement=function(percent){
    return (1-Math.cos(percent*Math.PI)) / 2;
}

animationscroll.dotask=function(target, functionref, tasktype){ 
    var tasktype=(window.addEventListener)? tasktype : "on"+tasktype;
    if (target.addEventListener)
        target.addEventListener(tasktype, functionref, false);
    else if (target.attachEvent)
        target.attachEvent(tasktype, functionref);
}

animationscroll.getCookie=function(Name){ 
    var re=new RegExp(Name+"=[^;]+", "i");
    if (document.cookie.match(re))
        return document.cookie.match(re)[0].split("=")[1];
    return "";
}

animationscroll.setCookie=function(name, value){
    document.cookie = name+"="+value;
}