jQuery addClass example
Change class name on click in jQuery
by Arup Rakshit
HTML
<div class='sharewpopup'>
<a class='fb'>Share to Facebook</a>
</div>
<!--POST 1-->
<div class='post'>
<h2 class='title'><a href='#LINK1'>POST TITLE 1</a></h2>
<a class='share' href='#'>Share</a>
</div>
<!--POST 2-->
<div class='post'>
<h2 class='title'><a href='#LINK2'>POST TITLE 2</a></h2>
<a class='share' href='#'>Share</a>
</div>
JavaScript
var $fbLink = $('.sharewpopup .fb');
$('.share').on('click', function(e) {
var $link = $(this).closest('.post').find('.title a');
$fbLink.attr('href', $link.attr('href'));
})