<div class="button-group">
  <div class="form-group">
    <div class="number">
        <button class="minus">-</button>
        <input type="text" value="1" size="2" id="input-quantity"/>
        <button class="plus">+</button>
    </div>
    <button type="button" class="bttn1" data-toggle="tooltip" title="{{ button_wishlist }}" onclick="wishlist.add('{{ product.product_id }}');"><i class="fa fa-heart"></i></button>
    <button type="button" class="bttn2" onclick="cart.add('{{ product.product_id }}');"><i class="fa fa-shopping-cart"></i> <span class="hidden-xs hidden-sm hidden-md">{{ button_cart }}</span></button>
  </div>
  </div>

var singleValue = $("#input-quantity").val()