<form method="get" action="http://www.google.com/search">
<div class="input-group" style="width: 220px">
<input type="text" class="form-control" name="q" placeholder="search">
- <a class="input-group-addon"><span class="glyphicon glyphicon-search"></span></a>
+ <span class="input-group-btn">
+ <button class="btn btn-default glyphicon glyphicon-search" type="submit" style="font-size:20px"></button>
+ </span>
<input type="hidden" name="sitesearch" value="doc.arvados.org"/>
</div>
</form>