PHP上传进度条[重复]

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            <div class="grid--cell mb0 mt8">Closed <span title="2012-01-12 13:37:27Z" class="relativetime">8 years ago</span>.</div>
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Possible Duplicate:
Upload Progress Bar in PHP

I have been researching this with no success.

I have a php script which uploads a picture to Facebook. On the main page I want to show a button or a link or an image which starts a progress bar and runs the upload script at background.

Here is the upload.php file:

<?php 

include_once 'facebook.php';
include_once 'config.php';

$facebook = new Facebook(array(
'appId'  => FACEBOOK_APP_ID,
'secret' => FACEBOOK_SECRET_KEY,
'fileUpload' => true,
));

$uid = $facebook->getUser();
$me = $facebook->api('/me');

$FILE = "images/$uid.jpg";//the file is already stored   

$args = array('message' => 'Check yours on: http://apps.facebook.com/dec-death');
$args['image'] = '@' . realpath($FILE);

$data = $facebook->api('/'.$uid.'/photos', 'post', $args);

echo 'Picture has been uploaded';

?>

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