XPages Date On screen problem

From this code please fix bug JSS can use Datetime Class on screen. This example will be convert to Java Date to display on screen.

sessionScope.PeriodValue = getComponent("Period").getValue();
if (sessionScope.PeriodValue != "1")
{
    var dt:NotesDateTime = document1.getItemValueDateTime("BeginDate");
    var jdt:java.util.Date = dt.toJavaDate();
    document1.setValue("EndDate", jdt)
}
if (sessionScope.PeriodValue == "2")
{
    var begindt:NotesDateTime = session.createDateTime("8:30");
    var enddt:NotesDateTime = session.createDateTime("12:00");
    var jbegindt:java.util.Date = begindt.toJavaDate();
    var jenddt:java.util.Date = enddt.toJavaDate();
    document1.setValue("BeginTime", jbegindt);
    document1.setValue("EndTime", jenddt);
}else if (sessionScope.PeriodValue == "3")
{
    var begindt:NotesDateTime = session.createDateTime("13:00");
    var enddt:NotesDateTime = session.createDateTime("17:30");
    var jbegindt:java.util.Date = begindt.toJavaDate();
    var jenddt:java.util.Date = enddt.toJavaDate();
    document1.setValue("BeginTime", jbegindt);
    document1.setValue("EndTime", jenddt);
}