function newsletter_in(element)
{
   if(element.value == 'wpisz e-mail')
   {
      element.value = '';
      element.style.fontSize = '18px';
   }
}

function newsletter_out(element)
{
   if(element.value == '')
   {
      element.value = 'wpisz e-mail';
      element.style.fontSize = '18px';
   }
}