if(document.layers)
{
	os = "n4";
}
else if(document.getElementById&&!document.all)
{
	os = "n6";
}
else if(document.all)
{
	os = "ie";
}

function addfav(url, title)
{
	if(window.sidebar)
	{
          window.sidebar.addPanel(title,url,"");
	}
	else if(window.opera && window.print)
	{
          var elem = document.createElement('a');
          elem.setAttribute('href',url);
          elem.setAttribute('title',title);
          elem.click();
	}
	else if(os == "ie")
	{
          window.external.AddFavorite(url,title);
	}
}

function set_display(element, akce)
{
	if(akce == "close")
	{
		document.getElementById("grey").style.display = "none";
		document.getElementById(element).style.z_index = 1;

		document.getElementById(element).style.display = "none";		
		document.getElementById(element).style.z_index = 1;	
	}
	else
	{
		document.getElementById("grey").style.display = "block";
		document.getElementById(element).style.z_index = 2;
		
		document.getElementById(element).style.z_index = 3;
		document.getElementById(element).style.display = "block";		
	}
}