<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="social-float-parent"> <div id="social-float"> float... </div> </div> <div id="footer"> </div>

div.social-float-parent { width: 100%; height: 1000px; background: #f8f8f8; position: relative; } div#social-float { width: 200px; position: fixed; left: 10px; bottom: 10px; background: #777; } div#footer { width: 100%; height: 200px; background: #eee; }

function checkOffset() { if($('#social-float').offset().top + $('#social-float').height() >= $('#footer').offset().top - 10) $('#social-float').css('position', 'absolute'); if($(document).scrollTop() + window.innerHeight < $('#footer').offset().top) $('#social-float').css('position', 'fixed'); // restore when you scroll up $('#social-float').text($(document).scrollTop() + window.innerHeight); } $(document).scroll(function() { checkOffset(); });