Windows wallpaper download script

wwd.js

var saveToDisk = function (fileURL, fileName) {  
    // for non-IE
    if (!window.ActiveXObject) {
        var save = document.createElement('a');
        save.href = fileURL;
        save.target = '_blank';
        save.download = fileName || 'unknown';

        var event = document.createEvent('Event');
        event.initEvent('click', true, true);
        save.dispatchEvent(event);
        (window.URL || window.webkitURL).revokeObjectURL(save.href);
    }

    // for IE
    else if ( !! window.ActiveXObject && document.execCommand)     {
        var _window = window.open(fileURL, '_blank');
        _window.document.close();
        _window.document.execCommand('SaveAs', true, fileName || fileURL)
        _window.close();
    }
}

var elems = document.querySelectorAll('.galleryGrid .para a');
for (i = 0; i < elems.length; i++) {
  var url = elems[i].href;
  var pathname = elems[i].pathname;
  var filename = pathname.substr(pathname.lastIndexOf('/') + 1);
  
  saveToDisk(url, filename);
}

Script that downloads wallpapers from Windows page (http://windows.microsoft.com/pt-br/windows/wallpaper).

Paste this script in Console tab (F12) on your favorite browser.