Can you please refer to the following documentation article
It is also important to note that if you would like to load jQuery, we highly recommend that you use the built-in jQuery library which comes with Sitefinity (version 1.8.3). To do this, you can use the ResourceLinks
control as shown below which will ensure that the built-in jQuery library is loaded on your page or page template:
<%@ Register Assembly="Telerik.Sitefinity" Namespace="Telerik.Sitefinity.Web.UI" TagPrefix="sf" %>
If you would like to use a different version of jQuery, please refer to the following article
on how to load different version of jQuery and to avoid conflicts which may occur between the different versions.
What I can also suggest is that you inspect the browser's console in order to check if there are any error messages logged there which will help you to find out what is the reason for the issue.
In addition to this you can try to test on a brand new page with no template or based on one of the built-in templates and add only your custom logic there and check if it will be working fine. This way you can isolate your custom code and check if it is not conflicting with any other scripts you load on this page.
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and vote to affect the priority of the items