<div class="btn-groups" align="right">
    <a class="publish_all btn btn-vk" href="javascript: void(0);" onclick="addVoucher()">Add Voucher</a>
    <!--<a class="publish_all btn btn-reddit" href="#" ><i class="fa fa-eye"></i>View Bill</a>
    <a class="publish_all btn btn-success" href="#" ><i class="fa ion-ios-email"></i>Email Invoice</a>-->
</div>