Hi, With Koha 16.11.11 - on Ubuntu 14.04 Desktop -by Package method Installation, I am trying to place a bootstrap drop-down menu on OPAC header section. Please find the code that has been tried. The menubar is displaying properly but when I click on it (href) link, it jumps and moves the link to half-a-page down. I tried with clearing browser cache, then also not working. I tried with other browsers, IE, Mozilla, etc. Problem remains same across the browsers. I don't have any clues about other codes like JavaScript and CSS also responsible for it. I had referred to following URL for the code, but not succeeded. https://v4-alpha.getbootstrap.com/components/dropdowns/ Kindly share Dropdown header codes (Opac-Header, JS, CSS), if you have implemented for your Koha OPAC ------------------- OPAC Header --------------- <!DOCTYPE html> <html> <head> <style> .center { margin: 0; border: 0 position: relative width:100%; padding: 0px; color: #FFFFFF; padding: 0px 15px; text-decoration: none; font-family: 'Oswald', sans-serif; font-size: 11px; text-transform: uppercase; font-weight: normal; } } </style> </head> <body> <div class="row"> <nav class="navbar navbar-default"> <ul class="nav navbar-nav"> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"><strong>ABOUT</strong><span class="caret"></span></a> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"><strong>E-Book</strong><span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="https://link.springer.com/search?facet-content-type=% 22Book%22&showAll=false"target=”_blank">Springer</a></li> <li><a href="https://www.tandfonline.com/"target=”_blank">CRC Press</a></li> </ul> </li> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"><strong>E-Journals</strong><span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="http://ascelibrary.org"target=”_blank”>ASCE</a></li> <li><a href="http://ieeexplore.ieee.org/Xplore/home.jsp"target=”_blank”>IEEE DL</a></li> <li><a href="http://asmedigitalcollection.asme.org/journals.aspx" target=”_blank">ASME</a></li> <li><a href="http://search.proquest.com"target=”_blank”>ProQuest</a></li> <li><a href="http://www.tandfonline.com/"target=”_blank">Taylor & Francis</a></li> </ul> </li> </nav> </div> </body> </html> ----------------- With thanks Saitsh MV Librarian Govt. Engineering College, Hassan Karnatka, INDIA.