$(document).ready(function(){

  $('input[name="email"]').click(function(){
    if( $('input[name="email"]').val() == 'Váš e-mail...') $('input[name="email"]').val('');
  });

  $('a[href="/img/certifikat-iso.jpg"]').lightBox();
  $('.main a>img').parent().lightBox();
});