var videoWindow = null;

//-------------------------------------
// show a new window 
//-------------------------------------
function showWindow(filename, width, height) {
	if (videoWindow != null) {
		videoWindow.close();
	}
	videoWindow = window.open(filename,'','toolbar=no, directories=no, location=no, status=no, menubar=no, resizable=no, scrollbars=no, top=40, left=40, width='+width+', height='+height);
}