Pinterest supports JSONP, no need to use sharre.php

[tmorehouse]

function getSharesPinterest(el,href) {
    // el => element to update
    // href => url to check
    $.ajax({
        url: 'http://api.pinterest.com/v1/urls/count.json',
        type: 'get',
        dataType: 'jsonp',
        data: { url: href }
    }).done(function(data) {
        $(el).text(data.count);
    });
}