gistfile1.js

$('.btn-pinterest').click(function() {
    var url = $(this).attr('href');
    var media = $(this).attr('data-image');
    var desc = $(this).attr('data-desc');
    window.open(
        "//www.pinterest.com/pin/create/button/"+
            "?url="+url+
            "&media="+media+
            "&description="+desc,
        'popupwindow',
        'scrollbars=yes,width=800,height=315');
    return false;
});