var date = new Date("April 2, 2010");
var description = "Viernes Santo";
var now = new Date();
var diff = date.getTime() - now.getTime();
var days = Math.floor(diff / (1000 * 60 * 60 * 24));
if (days > 1) {
document.write("Faltan " + (days+1) + " dias para el " + description);
}
else if (days == 1) {
document.write("Pasado maņana es " + description);
}
else if (days == 0) {
document.write("Maņana es " + description);
}
else {
document.write("Hoy es " + description + "!");
}