Custom JS on a specific page

First of all, you should declare your scripts using wp_enque_script.

Second, jQuery is loaded automatically in WordPress and is set to no conflict mode. See the documentation for how to link a script that depends on jQuery.

Lastly, if you want it to appear on just one page you have two options

  1. In your functions.php file add a custom field to either enable this script on that page.

  2. Manually insert it on a given page, again via functions.php To target only the home page is_home() but of course you could just reference a page by it’s page_id like this get_page( $page_id ).