var dias = ["Lunes", "Martes", "Miercoles", 
            "Jueves", "Viernes", "Sabado", "Domingo"];
var v = 0;
  for (var i = 0; i < dias.length; i++) {
    console.log(dias[i]);
    document.write(++v + " - " + dias[i] + " <br> ");
  }