How to insert .php page inside an HTML element with JS

Hello, I'm calling a page .php with method load , its problem is that when I give include to something it should be include './dir/arquivo.php'; after load loads the page % is forced to stay this way to work include , plus some elements do not work.

But when I use only ../dir/arquivo.php direct, without JS to call, it works perfectly, I'd like a way to make JS (or even PHP) run include ( or some form that is not include 'arquivo.php' ) when the button is pressed.

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js"></script><scriptsrc="http://malsup.github.com/jquery.form.js"></script> 
<script type="text/javascript">   
$(document).ready(function(){
    $("#button").click(function(){
        $("#div").load('arquivo.php');
    });
});
</script>
<input type="button" id="button">
<div id="div"></div>

Sample code that does not work:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js"></script><scripttype="text/javascript">   
$(function() 
{
var bar = $('.bar');
var percent = $('.percent');
var status = $('#status');

var upload = $('form').ajaxForm(
{
    beforeSend: function() 
    {
    },
    uploadProgress: function(event, position, total, percentComplete) 
    {
        //aumenta barra de progresso
    },
    complete: function(xhr) 
    {
    }
});
});
</script>

<form enctype="multipart/form-data" method="post" id="formSendTorrent"    name="formSendTorrent">
    <input type="file" multiple name="inputfileSendTorrent[]"       id="inputfileSendTorrent"> 
    <input type="submit" name="submitSendTorrent" value="Enviar">
</form>
<?php 
if(isset($_POST['submitSendTorrent']))
{      
header('Location: index.php');
} 
?>