Can you make secure login for website in js?

Hey reddit.. I'm searching for a secure way to make people login onto my website so only the authorised people get to see the content. Any advice? Is this even possible with js or jquery etc?.. Thanks

Great design resource

100 Things Every Designer Needs to Know About People (Voices That Matter) Submitted September 17, 2015 at 10:46PM by MasterGroove http://ift.tt/1MtFPox