var target = [];
      var imgs = document.querySelectorAll('img');
      imgs.forEach(function (elm, index) {
        console.log(elm.getAttribute('src'));
        console.log(index);
        target[index] = document.createElement('a');
        target[index].download = index + '.jpg';
        target[index].setAttribute('href', elm.getAttribute('src'));
        document.body.appendChild(target[index])
        console.log(target[index]);
        evt = document.createEvent('MouseEvent');
        evt.initEvent('click', true, false);
        target[index].dispatchEvent(evt);
      });