jquery+mask+email

if ( $("span.mailme").length ) {
  // variables, which will be replaced
  var at = / AT /;
  var dot = / DOT /g;
 
  // function, which replaces pre-made class
  $('span.mailme').each(function () {
    var addr = $(this).text().replace(at, '@').replace(dot, '.');
    $(this).after('<a href="mailto:' + addr + '">' + addr + '</a>');
    $(this).remove();
  });
}