Javascript not working

Hello Support,

When I go to the webpage : http://www.omecmotors.com/electric-motor-stock/?IE=IE2 and I change the specify the list is not changing.

But when ym login but when I am logged in as admin it is working.

Can you please tell me what I have to do to change it?

I have now turn on :
The admin user has been removed or renamed.
Your login area is protected from brute force attacks.
Malware scanning is enabled and running at scheduled intervals on your computer
The front page of your site is using a safe version of jQuery.
User’s nicknames are different from their display name.Edit
Your site is protecting against bots looking for known vulnerabilities.
The user with id 1 has been removed.
Your site will detect changes to your files.
You are protecting common WordPress files from access.
Your WordPress site is blocking suspicious looking information in the URL.
Your WordPress installation is not telling every bot that you use WordPress.
Your WordPress installation is not allowing users without a user agent to post comments.
Users cannot execute PHP from the uploads folder.
User profiles for users without content are not publicly available.
You are blocking known bad hosts and agents with the ban users tool.
You have recently changed your WordPress Salts.
You have successfully disabled directory browsing on your site.
Your installation does not accept long URLs.
Your wp-config.php and .htaccess files are not writeable.
Your WordPress installation is not publishing the Windows Live Writer header.
Your WordPress installation is not publishing the Really Simple Discovery (RSD) header.
Version information is obscured to all non admin users.Edit
Users cannot edit plugin and themes files directly from within the WordPress Dashboard.
Your login page is not giving out unnecessary information upon failed login.

Thanks for the free support!

https://wordpress.org/plugins/better-wp-security/