var now = new Date();
var then = new Date("sep 06, 2010");
var gap = then.getTime() - now.getTime();
gap = Math.floor(gap / (1000 * 60 * 60 * 24));

var R = "Faltan "+ gap + " días para DON BENITO, Sub 19, Promesas, Féminas .";
document.write(R);