My .js file is not included in my site
***EDITED****

How about if you add the js into the HEAD tag .  

This goes into your default Theme that is being used and you need to add this hook to the template.php file ; if it doesn't already exist.  Remember to Clear you cache afterwards also. 

/**
* hook_preprocess_html
*/

function yourtheme_preprocess_html(&amp;$variables, $hook) {

   drupal_add_js(drupal_get_path('theme', 'yourtheme') . '/js/common.js');


}