//UTF8 string: ìšèøžýáíéù

function ChangePicture(obrazek,novy)
{
	document.images[obrazek].src=novy.src;
}

function GetElement(name)
{
	if (window.self.document.getElementById)
		return window.self.document.getElementById(name);
	else if (window.self.document.all)
		return window.self.document.all[name];
	else if (window.self.document.layers)
		return window.self.document.layers[name];
}

function GetStyle(name)
{
	var elem;
	
	if(window.self.document.getElementById || window.self.document.all)
	{
		elem = GetElement(name);
		if (elem != null)
			return elem.style;
		else
			return "";
	}
	else if(window.self.document.layers)
		return window.self.document.layers[name];
}

function open_win(url,name,win_width,win_height)
{
    var x = screen.width/2 - win_width/2;
    var y = screen.height/2 - win_height/2;
    if (x <= 0) x = 20;
    if (y <= 0) y = 20;
	var myRef = window.open(url,name,'left='+x+',top='+y+',width='+win_width+',height='+win_height+',toolbar=no,resizable=yes,status=no,scrollbars=no');
	myRef.focus();
}