How to add js in drupal?

Use the following code to add js in drupal:

 

<?php
  // This will add a JS file to your head (specifically the $scripts variable in page.tpl.php)
  drupal_add_js(drupal_get_path('module', 'my_module') . '/my_module.js');

  // This add inline JS to the head of the document
  drupal_add_js('alert("Hello!")', 'inline');

  // This will add variables in the Drupal.settings object
  drupal_add_js(array('my_module' => array('my_setting' => 'this_value')), 'setting');?>

 

Enjoy Drupaling!

Cheers!