<button data-id="1" data-type="listing" data-action="bookmark" id="bookmark-button" class="like-button"><span class="like-icon"></span> Bookmark this listing</button>
<span id="bookmark-count">1 people bookmarked this listing</span>

function to_bookmarks()
    {
        var current = $(this);
        var type = current.data('type');
        var pk = current.data('id');
        var action = current.data('action');
        var t = null
        var count = $('#bookmark-count');

        $.ajax({
            url : "/bookmarks/" + type + "/" + pk + "/",
            type : 'POST',
            data : { 'pk' : pk },

            success : function (json) {
                if(json.count = 1){
                    t = '1 person bookmarked this listing';
                } else {
                    t = json.count + ' people bookmarked this listing';
                }
                count.text(t);
            }
        });

        return false;
    }

$(function() {
    $('#bookmark-button').click(to_bookmarks);
});