Different images on different paths.

I needed this with different images on different paths.
I created it, code looks like so:

In the admin.inc file I replaced

$form['bgs']['backstretch_image_url'] = array(
    '#title' => t('Default Image URL'),
    '#description' => t('Default URL of picture to display as backstretched background (begin with / if local to drupal). Leave blank for none.'),
    '#type' => 'textfield',
    '#default_value' => variable_get('backstretch_image_url', ''),
  );

By

$form['bgs'] = array(
    '#title' => t('backgrounds'),
    '#type' => 'fieldset',
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['bgs']['backstretch_image_url'] = array(
    '#title' => t('Default Image URL'),
    '#description' => t('Default URL of picture to display as backstretched background (begin with / if local to drupal). Leave blank for none.'),
    '#type' => 'textfield',
    '#default_value' => variable_get('backstretch_image_url', ''),
  );

  $form['bgs']['backstretch_image_url_paths'] = array(
    '#title' => t('backstretch paths and their images.'),
    '#description' => t('every line is a separate entry. <br> Separate the path fro the image path with the | character.<br><front>|image1<br>node/xx|image2'),
    '#type' => 'textarea',
    '#default_value' => variable_get('backstretch_image_url_paths', ''),
  );

And in the module I altered the hook page_alter by the following code.
I am very sorry that I did not start form the latest version, you could port this.

function backstretch_page_alter(&$page) {
  $current_path = drupal_get_path_alias($_GET['q']);
  if (($library = libraries_load('backstretch')) && !empty($library['loaded'])) {
    
    if (module_exists('context')) { 
      if ($plugin = context_get_plugin('reaction', 'backstretch')) {
        $plugin->execute();
      }
    }
    $lines = explode("\n",variable_get('backstretch_image_url_paths'));
    $paths = array();
    foreach($lines as $line){
      $items = explode('|',$line);
      $paths[] = array('path' => $items[0],'image' => $items[1]);
    }
    $paths[] = array('path' => '*' , 'image' => variable_get('backstretch_image_url', ''));
    foreach($paths as $path){
      if(drupal_match_path($current_path,$path['path'])){
          $image = $path['image'];
          break;
      }
    }
      
    if ($url = $image || $plugin) {
      $settings = array(
        'backstretchURL' => $image,
        'backstretchMinWidth' => variable_get('backstretch_min_width', 0),
      );

      if (variable_get('backstretch_scroller', FALSE)) {
        $settings['backstretchScroller'] = TRUE;
        $settings['backstretchScrollerAdj'] = variable_get('backstretch_scroller_adjustment', 0);
      } 
      drupal_add_js($settings, 'setting');
      drupal_add_js(drupal_get_path('module', 'backstretch') .'/bs.js', array('scope' => 'footer'));
    } 
  } 
}