function subon(F1)
{   F1.reg.disabled = false;
}
function capon()
{   var R = Math.random() * 66;
    R = Math.ceil(R);
    document.getElementById('captcha').innerHTML = "<img src='../cap/a"+R+".gif ' />";
    document.getElementById('capvalu').innerHTML = "<input type='hidden' name='cap0' value='"+R+"'>"
}