select href

by ostapische

HTML

<form class="form-horizontal">
  <select class="relationship" id="Relationship" onchange="$('.download').attr('href', $(this).val());">
    <option value='#'>Select Form</option>
    <option value="http://get.geo.opera.com/pub/opera/desktop/15.0.1147.153/win/Opera_15.0.1147.153_Setup.exe">Opera</option>
    <option value="https://download-installer.cdn.mozilla.net/pub/mozilla.org/firefox/releases/22.0/win32/ru/Firefox%20Setup%20Stub%2022.0.exe">Firefox</option>
  </select>
  <a class="btn btn-large btn-primary download" href="#">
      <i class="icon-download"></i>Download Form
  </a>
</form>