Access to PHP SESSION datda from JavaScript

session.js

You can produce the javascript file via PHP. Nothing says a javascript file must have a .js extention. For example in your HTML:

<script src='javascript.php'></script>
Then your script file:

<?php header("Content-type: application/javascript"); ?>

$(function() {
    $( "#progressbar" ).progressbar({
        value: <?php echo $_SESSION['value'] ?>
    });

    // ... more javascript ...
If this particular method isn't an option, you could put an AJAX request in your javascript file, and have the data returned as JSON from the server side script.