jquery alternative to change or keyup

I have a form in which the user must initial a bunch of different sections.

<script>
  $.function(){
    $('.initialMe').change(function(){
      var id = $(this).attr('id');
      alert(id);
    }); 
  });
</script>

<?php
  echo "<div class='signature'>Initial Here:<input type='text' class='initialMe' id='sign[service1]' name='sign[service1]' size='4'></div>";
  echo "<div class='signature'>Initial Here:<input type='text' class='initialMe' id='sign[service2]' name='sign[service2]' size='4'></div>";
?>

I want to fire off an action when they are done initializing the text box. I don't want to use change because they have to click off somewhere for event to be fired. I don't want to use keyup, because event will fire after first letter of initials. I do not know if user will use 2 letters or 3 for initials. This is not a submittable form. Think of it as a legal document where the user has to initial different sections of the page. What options do I have?

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