function reloadArticles(){
	var loadHtml = '<div class="loading">&nbsp;</div>';
	$('download_files').innerHTML = loadHtml;
	var params = Form.serialize("critForm");
	var url = 'http://www.gsn.cn.com/fileadmin/gsn/ajax/ajax_controller.php';
	params += '&ajax_handler=gsn_downloads';
	new Ajax.Updater( 'download_files', url, {method: 'post', parameters: params });
}