2. To add a JavaScript file depending on a certain condition, you can add it
using some PHP code in a preprocess function:
- drupal_add_js('js/my-jquery-script.js', array('group' => JS_THEME));
+ drupal_add_js(drupal_get_path('theme', 'THEME_NAME') . '/js/my-jquery-script.js', array('group' => JS_THEME));
For the full documentation of drupal_add_js(), see:
http://api.drupal.org/api/function/drupal_add_js