provide Previous and Next functionality in html pages

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Javascript

Hi,

I want to provide Previous and Next functionality in html pages.
When i click on "Next" button it should take me to next page related to that topic.
Example:
var pages=["1.html","2.html","3.html"];

so if I at the index(main page) and click on next it should take me to "1.html" and if next is clicked then "2.html"...
Similarly for "Previous" button.

This will be applicable to each html page I have.
As each page has different topics.

Regards,
Archie