function loadThumb(element, vimeo, youtube) {
    if (vimeo != '') {
        $.getJSON('http://www.vimeo.com/api/v2/video/' + vimeo + '.json?callback=?', {
            format: "json"
        }, function(data) {
            $(element).find('img').attr('src', data[0].thumbnail_medium);
        });
    }
    else if (youtube != '') {
        $(element).find('img').attr('src','http://img.youtube.com/vi/'+youtube+'/0.jpg');
    }
}

function loadThumbs() {
    var blank_img = '/sitefiles/14/design/50transparent-black.png';
    $('#main').find('.MediaBox').each(function() {
        if($(this).find('img').attr('src') == blank_img) loadThumb(this, $(this).attr('data-vimeo'), $(this).attr('data-youtube'));
    });
}