var _opened_windows = new Array();

var popup_window = function (u, w, h, n)
{
	var l	= w == screen.width ? 0 : (screen.width / 2) - (w / 2);
	var t	= h == screen.height ? 0 : (screen.height / 2) - (h / 2) - 25;
	
	n = n ? n : "win";

	if (_opened_windows[n] != null)
	{
		_opened_windows[n].close();
	}

	var win = window.open(u,
												n, 
												"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no, left=" + l + ", top=" + t + ", width=" + w + ", height=" + h);

	_opened_windows[n] = win;
	
	win.focus();
}


function open_videostream(u)
{
	popup_window(u, 782, 560, "videostream")
}

function open_intro(nr)
{
	popup_window("/?/intro/" + nr, 720, 350, "intro")
}