function previewSidebar(name, url){
	var sidebar = window.open(url,"sidebar","width=162,height=450,scrollbars=yes,resizable=yes");
	sidebar.focus();
	return false;
}

function addSidebar(name, url, config_url){
	if(config_url == null) config_url = "";

	if((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")){
		window.sidebar.addPanel(name, url, config_url);
	}else{
		window.alert("Váš prohlížeč tohle neumí. Zkuste Mozillu.");
	}
}