var mainContent=null;
var sliderStyle=null;
var skyOffsetHeight=null;
var skyOffsetWidth=null;
var mainContentOffsetWidth=null;
var fps=30;
var isOpera=(window.opera)?true:false;
var d=isOpera?600:1000;
var f=d/1000*fps;
var sliderVisible=false;
var balken_calc_top_old=getScrollTop();
var balken_old_top=getScrollTop();



function getScrollTop(){
    var _1 = 85;
	if(typeof(window.pageYOffset)=="number"){
		if(window.pageYOffset > 102){
			_1=window.pageYOffset;
		}else{
			_1=102;
		}
	}else{
		if(document.body && document.body.scrollTop){
			_1=document.body.scrollTop;
		}else{	
			if(document.documentElement && document.documentElement.scrollTop){
				_1=document.documentElement.scrollTop;
			}
		}
	}
	
	return _1;
}

function updateSlider(){

	var _2= 0;
	
	if(getScrollTop() <= 103){
		_2 = getScrollTop() + 1;
	}else{
		_2 = getScrollTop()+ 50;
	}
	
	
	if(_2!=balken_old_top){
		var _3=-(_2-balken_old_top)*(3/f)*((3/f)-2)+balken_old_top;
		if(Math.abs(_3-_2)<3){
			_3=_2;
		}else{
			_3=Math.round(_3);
		}
		sliderStyle.left=mainContentOffsetWidth+"px";
		balken_old_top=_3;sliderStyle.top=_3+"px";
	}
	if(!sliderVisible){
		sliderStyle.visibility="visible";sliderVisible=true;
	}

}

function startSlider(){

	var _4=document.getElementById("sky_scroll");
	var mainContent=document.getElementById("content");
	if(!_4||!mainContent){
		return false;
	}
	sliderStyle=_4.style;
	mainContentOffsetWidth=mainContent.offsetWidth + 20;
	skyOffsetHeight = 0;
	skyOffsetWidth = 0;
	var _7=window.setInterval("updateSlider()",1000/fps);
	return true;
}