function popup(url, width, height, s)
{
	if(!width) width=640;
	if(!height) height=480;
	if(typeof Janela1=="object") {
		if(!Janela1.closed) Janela1.close();
	}
	Janela1 = window.open(url,"PopUp","resizable,scrollbars=" +s+ ",top=50,left=50,width=" +width+ ",height="+height);
}

function comentar(ref, cod, id_autor, titulo, hash) {
	querystring = "ref=" + ref + "&cod=" + cod + "&id_autor=" + id_autor + "&titulo=" + escape(titulo) + "&hash=" + escape(hash);
	if(typeof Janela1=="object") {
		if(!Janela1.closed) Janela1.close();
	}
	Janela1 = window.open("/comentarios/comente.php?" + querystring,"PopUp","resizable,scrollbars=1,top=50,left=50,width=420,height=480");
}