(function() {
    var logEl = document.getElementById('log');
    function log(m) { var d = document.createElement('div'); d.className='pkg-log-entry'; d.textContent=m; logEl.appendChild(d); logEl.scrollTop=logEl.scrollHeight; }
    var uploader = new MultipleUpload('#demo', {
        uploadUrl: '/api/upload',
        multiple: true,
        onEnable: function() { log('Uploader ENABLED'); },
        onDisable: function() { log('Uploader DISABLED'); }
    });
    document.getElementById('toggle-btn').addEventListener('click', function() {
        if (uploader.isEnabled()) uploader.disable();
        else uploader.enable();
    });
})();