var interval = "";
function startInterval()
{
    interval = window.setInterval("tTimer()",1000);
}
function stopInterval()
{
    window.clearInterval (interval);
    interval="";
}
function tTimer()
{
    document.timerview.display.value = i--;
    if (i == -1)
    {
        stopInterval();
        document.formu.submit();
    }
}