var scrollmenu=function(){
	this.initialize.apply(this,arguments);
};
scrollmenu.prototype={
	Version:'0.9.5',Interval:500,Duration:80,marginTop:0,marginBottom:0,_timer:0,_obj:null,initialize:function(e,p,r){
		this.attach(window,'load',this.bind(this.prepare,arguments));
	},prepare:function(e,p,r){
		if(o=document.getElementById(e)){
			this._obj={
				'e':o,'p':(p)?document.getElementById(p):o.parentNode,'r':(r)?document.getElementById(r):null};
			o.style.position='absolute';
			if((c=o.offsetTop)!=(v=((o.style.top=o.offsetTop+'px')!='')?o.offsetTop:0)){
				o.style.marginTop=0;o.style.top=c+(v-c)+'px';
			}
			this.callback();
		}
	},callback:function(){
		f=this.event.update(this,this._obj);
		setTimeout(this.bind(this.callback),(f)?10:this.Interval);
	},bind:function(method,arg){
		var _this=this;
		var _arg=(arg)?arg:[];
		return function(){
			method.apply(_this,_arg);
		}
	},attach:function(e,name,func,cap){
		if(e.addEventListener){
			e.addEventListener(name,func,cap);
		}
		else if(e.attachEvent){
			e.attachEvent('on'+name,func);
		}
	},setTween:function(f,d){
		if(f){
			this.tween=f;
		}
		if(d){
			this.Duration=d;
		}
	},tween:function(t,b,c,d){
			return c*(t/=d)*t+b;
	}
};scrollmenu.prototype.event={
	update:function(t,o){
	var tpos=Math.max(this.scroll(),(o.r)?this.offset(o.r)+this.height(o.r):this.offset(o.p));
	var bpos=(this.offset(o.p)+this.height(o.p))-(this.height(o.e)+t.marginBottom);
	var s=this.offset(o.e);
	var e=Math.min(bpos,tpos+t.marginTop);
	if((t._prev!=e)||(t._timer>t.Duration)){
		t._timer=0;
	}
	if((t._prev=e)!=s){
		o.e.style.top=t.tween(t._timer++,s,e-s,t.Duration,o.e.style)+'px';
		return true;
	}
	return false;
	},scroll:function(){
		return document.body.scrollTop||document.documentElement.scrollTop;
	},height:function(o){
		return o.offsetHeight||document.body.scrollHeight||document.documentElement.scrollHeight;
	},offset:function(o){
		y=o.offsetTop;
		if(o.style.position=='absolute')return y;
		while(o=o.offsetParent){
			y+=o.offsetTop;
		}
	return y;
	}
};
var obj = new scrollmenu('Utility_Box','Top');
obj.marginTop = 140;