How to get the url from link rel="next" in <head> with javascript -

how url from

<link rel="prev" title="selected 3" href="http://mydomain.com/2.html" />

in head using pure javascript?

in jquery have working solution:

var prevurl = $('link[rel=prev]').attr("href");

i can't change output of "link rel" or add id, generated cms.

any appreciated, thanks.

ie8+

document.queryselector('link[rel="prev"]').href;

Funaction