Tree Help! Blank root folder?! Json is correct?

[SkoalFyfan]

I'm trying to generate a tree on my local folder.

Here is my json code:

<?php
// from php manual page
function formatBytes($val, $digits = 3, $mode = "SI", $bB = "B"){ //$mode == "SI"|"IEC", $bB == "b"|"B"
   $si = array("", "K", "M", "G", "T", "P", "E", "Z", "Y");
   $iec = array("", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi");
   switch(strtoupper($mode)) {
       case "SI" : $factor = 1000; $symbols = $si; break;
       case "IEC" : $factor = 1024; $symbols = $iec; break;
       default : $factor = 1000; $symbols = $si; break;
   }
   switch($bB) {
       case "b" : $val *= 8; break;
       default : $bB = "B"; break;
   }
   for($i=0;$i<count($symbols)-1 && $val>=$factor;$i++)
       $val /= $factor;
   $p = strpos($val, ".");
   if($p !== false && $p > $digits) $val = round($val);
   elseif($p !== false) $val = round($val, $digits-$p);
   return round($val, $digits) . " " . $symbols[$i] . $bB;
}
Modified the end here so its my local folder by making it ./
$dir = isset($_REQUEST['lib'])&&$_REQUEST['lib'] == 'yui' ? '../../../' : './';
$node = isset($_REQUEST['node'])?$_REQUEST['node']:"";
if(strpos($node, '..') !== false){
    die('Nice try buddy.');
}
$nodes = array();
$d = dir($dir.$node);
while($f = $d->read()){
    if($f == '.' || $f == '..' || substr($f, 0, 1) == '.')continue;
    $lastmod = date('M j, Y, g:i a',filemtime($dir.$node.'/'.$f));
    if(is_dir($dir.$node.'/'.$f)){
        $qtip = 'Type: Folder<br />Last Modified: '.$lastmod;
        $nodes[] = array('text'=>$f, 'id'=>$node.'/'.$f/*, 'qtip'=>$qtip*/, 'cls'=>'folder');
    }else{
        $size = formatBytes(filesize($dir.$node.'/'.$f), 2);
        $qtip = 'Type: JavaScript File<br />Last Modified: '.$lastmod.'<br />Size: '.$size;
        $nodes[] = array('text'=>$f, 'id'=>$node.'/'.$f, 'leaf'=>true/*, 'qtip'=>$qtip, 'qtipTitle'=>$f */, 'cls'=>'file');
    }
}
$d->close();
echo json_encode($nodes);
?>

The issue is that the root folder only renders and there is no expandable tree? Here is the result of the json if I manually go to the get-nodes.php file.

[{"text":"css","id":"\/css","cls":"folder"},{"text":"desktop.html","id":"\/desktop.html","leaf":true,"cls":"file"},{"text":"examples.js","id":"\/examples.js","leaf":true,"cls":"file"},{"text":"ext20","id":"\/ext20","cls":"folder"},{"text":"get-nodes.php","id":"\/get-nodes.php","leaf":true,"cls":"file"},{"text":"images","id":"\/images","cls":"folder"},{"text":"js","id":"\/js","cls":"folder"},{"text":"sample.js","id":"\/sample.js","leaf":true,"cls":"file"},{"text":"shared","id":"\/shared","cls":"folder"},{"text":"tempMenu.js","id":"\/tempMenu.js","leaf":true,"cls":"file"},{"text":"test.html","id":"\/test.html","leaf":true,"cls":"file"},{"text":"test.php","id":"\/test.php","leaf":true,"cls":"file"},{"text":"workspace.html","id":"\/workspace.html","leaf":true,"cls":"file"}]

Everything looks fine to me? I'm sure this is a common problem and just hope someone can point me in the right direction?

*UPDATE*: I've noticed in Firebug that the POST Response gets stuck with "Loading..." ???

[devnull]

if the response is getting stuck, then usually something on the server side is causing the php script to fail. i doubt it would cause problems, but i dont think you need to escape slashes.
it might also help to include the javascript code that is responsible for doing something with this.