function Dates() {
    var ent = document.getElementById('Entrada').value.split('/');
    var datent = new Date(ent[1] + '/' + ent[0] + '/' + ent[2]);
    var today = new Date();
    today.setTime(today.getTime() + (86400000));
    var dd = today.getDate();
    var mm = today.getMonth() + 1;
    var yyyy = today.getFullYear();
    var data = new Date(mm + '/' + dd + '/' + yyyy);
    if (datent.getTime() < data.getTime()) {
        datent = data;
        document.getElementById('Entrada').value = dd + '/' + mm + '/' + yyyy;
    };
    var sor = document.getElementById('Sortida').value.split('/');
    var datsor = new Date(sor[1] + '/' + sor[0] + '/' + sor[2]);
    datsor.setTime(datent.getTime() + (3 * 86400000));
    var dia = datsor.getDate();
    if (dia < 10) { dia = '0' + dia; };
    var mes = datsor.getMonth() + 1;
    if (mes < 10) { mes = '0' + mes; };
    var any = datsor.getFullYear();
    document.getElementById('Sortida').value = dia + '/' + mes + '/' + any;
}