function getEl(el)
{
	if(document.getElementById)
	{
		if(document.getElementById(el))
		{
			return document.getElementById(el);
		}
	}
}

var blok; 
var skyID=0;

function advertLoad() 
{
	if(getCookie("hideAdvertisting") != "1"){
		
		if(skyID)
		{
			window.clearInterval(skyID); 
			skyID=0;
		} 
		blok=getEl('advert'); 
		
		if(blok)
		{
			repos(); 
			skyID=window.setInterval("advertScroll()", 25);
			(window.attachEvent)?window.attachEvent("onresize",repos) : window.addEventListener("resize",repos,false);
		}
	}
}
function hideAdvert()
{
	blok.style.display="none";
	if(skyID)
	{
		window.clearInterval(skyID); 
		skyID=0;
	}
}
function advertScroll() 
{
	var zakTop=parseInt(blok.style.top);
	var pozice=(document.all)?5+parseInt(document.body.scrollTop):5+parseInt(window.pageYOffset); 
	var posun=zakTop-pozice;
		
		if (zakTop < pozice) 
		{	//skrolovanie dole
			blok.style.top = (zakTop - (Math.floor(posun-15)/10)) + 'px';
		}
		if (zakTop > pozice) 
		{	//skrolovanie hore
			blok.style.top = (zakTop - (Math.ceil(posun)/10)) + 'px';
		}
}
function repos() 
{
	blok.style.display = "block";
}

function hideBanner()
{
	setCookie("hideAdvertisting", "1");
	var banner;
	banner = document.getElementById('advert');
	banner.style.display="none";
	if(skyID)
	{
		window.clearInterval(skyID); 
		skyID=0;
	}
}