Bootstrap Search form
https://bootsnipp.com/snippets/featured/even-simpler-navbar-search
<form class="navbar-form" role="search">
<div class="input-group">
<input type="text" class="form-control" placeholder="Search...">
<span class="input-group-btn">
<button type="submit" class="btn btn-default">
<span class="glyphicon glyphicon-search">
<span class="sr-only">Search...</span>
</span>
</button>
</span>
</div>
</form>