Ciao darkonme, grazie per l'aiuto. Ho provato ad eseguire alla lettera quanto da te suggerito, ma non riesco a far visualizzare l'output del javascript...
Codice PHP:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
</script>
<style id='page-skin-1' type='text/css'>
</head>
<body>
<div id='copy' width="1000px" height="300px">
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#copy').load('miosito/loader.php');
alert('ciao');
});
</script>
</body>
</html>