这不是跨浏览器的解决方案，但是可以在Firefox和Opera中使用（不适用于ie8：-/）。采取从这里
[].slice.apply(document.images).filter(is_gif_image).map(freeze_gif);function is_gif_image(i) { return /^(?!data:).*.gif/i.test(i.src);}function freeze_gif(i) { var c = document.createElement('canvas'); var w = c.width = i.width; var h = c.height = i.height; c.getContext('2d').drawImage(i, 0, 0, w, h); try { i.src = c.toDataURL("image/gif"); // if possible, retain all css aspects } catch(e) { // cross-domain -- mimic original with all its tag attributes for (var j = 0, a; a = i.attributes[j]; j++) c.setAttribute(a.name, a.value); i.parentNode.replaceChild(c, i); }}
