JAVASCRIPT CODE ON COUNTDOWNING PDF FORM

Hello,

I put a JavaScript code at my pdf form. This JavaScript code its use for countdown.

I would like to know is its possible to insert in my JavaScript code:

- When the user download my PDF Form, the " Begin Time" starts ( todays date )

- And i would like to put a " End Time" example  a 1 year, 6 months, etc.. after the Begin Time automatically

This is my actually javacript code:

function Expire ()

{

// Obtém a data e hora atuais

var rightNow = new Date ();

// Setup End Date

var rightNow = new Date ();

var beginDate = new Date ();

var endDate = new Date ("5 minutos");

if (rightNow <beginDate || rightNow> endDate)

{

app.alert ("Passou do limite de tempo. Você não pode usar mais este documento.Entre em contato para continuar a usar este documento. Obrigado.", 0, 0);

this.closeDoc ()

}

}

// executa o código de expiração de verificação

Expire ();

Can you help me please??!

Thank You!!!