gistfile1.js

jQuery('.emailLink').click(function(e) {
  e.preventDefault();
  var $link = jQuery(this);
  var $sending = jQuery('<span>Sending...</span>');
  $link.after($sending);
  $link.hide();
  var restoreCb = function() {
    $link.show();
    $sending.remove();
  };
  jQuery.ajax({
    url: $link.attr('href'),
    error: function(xhr, textStatus, errorThrown) {
      // handle error
      restoreCb();
    },
    success: function(data) {
      // Do something with the data that is returned.
      // Only success in as much as the HTTP request
      // was a success!
      restoreCb();
    }
  });
});