Javascript (load and setInterval)?

I have a function in the index page where div #atualiza makes a load on home.php page and updates itself in x time.

index.php

var auto_refresh = setInterval (function()
    {$('#atualiza').load('home.php');
    cache:false;
    return false;
},60000);

On the home.php page I have another script for users to put emoticons in posts.

home.php

<script type="text/javascript" src="js/jquery.emotions.js"></script>
<script type="text/javascript">
$(document).ready(function (){
    $(".postagem").emotions();
});

</script>

The problem is the following when opening the index page for the first time everything works normal but when the #atualiza div refreshes it does not read the script from the home.php page anymore. I heard that load does not read the ready function of jQuery, I researched and found no solution.

How to make the page function home.php continue running? Thanks in advance!