Jquery for cascading

Question

Dear Supporter:

For a few days ago, I have put a question about cascading lookup in SharePoint, of course I received an answer (thank you very much), but I do not understand what to do. Can anyone help me with the following please:Where cann I find these script:

 1.- jquery.min.js 

2.- jquery.SPServices.min.js 

Here is my first consultation = http://www.c-sharpcorner.com/forums/cascading-of-lookup-dropdown

 

Many thanks for your support.

Regards