No javascript errors at all.
Would rather not share my url :(
in my header.php I have the correct line up:
require_once "phpuploader/include_phpuploader.php";
session_start();
the only thing I use different is ob_start();
So looks like this:
require_once "phpuploader/include_phpuploader.php";
ob_start();
session_start();
But I see no reason for that to make the button do nothing onclick.
BTW: Your code on its own does the same thing :(