phpMyAdmin undifined variable: format

I've been working on my form validation and swithcing js on/off ...
When I reloaded phpMyAdmin page this showed up :

phpMyAdmin - Error

Incorrect format parameter

Notice in .\import.php#187 Undefined variable: format

Backtrace

this is the code in the import.php#187:

/*
 * Sets globals from $_POST patterns, for import plugins
 * We only need to load the selected plugin
  */
    if (!in_array($format,array(
    'csv',
    'ldi',
    'mediawiki',
    'ods',
    'shp',
    'sql',
    'xml'))) {
    // this should not happen for a normal user
   // but only during an attack
   PMA_fatalError('Incorrect format parameter');
 }