// test value for day entry in date
function test_date_day(val)
{
  var pattern = /^[1-9]\d{0,1}$/;

  if( val.match(pattern)==null )
  {
    return false;
  }
  
  return true;
}

// test value for year entry in date
function test_date_year(val)
{
  var pattern = /^[1-9]\d{3}$/;

  if( val.match(pattern)==null)
  {
    return false;
  }
  return true;
}

// test number (maximum length is 32 digits)
function test_number(val)
{
  var pattern = /^\d{1,32}$/;

  if( val.match(pattern)==null)
  {
    return false;
  }
  return true;
}

// test email - approximate
function test_email(val)
{
  var pattern =  /.*@.*\..*/;

  if( val.match(pattern)==null)
  {
    return false;
  }
  return true;
}