pues podrias hacer lo siguiente
Código HTML:
Ver original<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]--> <!--======== Basic Page Needs =========-->
<!--======== Styles =========-->
span{
cursor:pointer;
}
<!--======== Scripts =========-->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function(){
$('span').click(function(){
var password = $('.password').val();
$('input[type="text"]').val(password);
});
});
<form method="post" action=""> <input class="password" type="password" value=""/> <input type="text" value="">
solo ingeniate el estilo