[整理]CSS3 滤镜

1.灰度 兼容

http://www.526net.com/blog/qianduan/226.html

http://james.padolsey.com/demos/grayscale/grayscale.js

http://my.oschina.net/py115/blog/65196

https://docs.webplatform.org/wiki/css/functions/grayscale

2.透明度 兼容

http://www.generatecss.com/advanced/image-filter-effects/

http://www.cnblogs.com/lostyu/p/3528785.html

http://www.cnblogs.com/fsjohnhuang/p/4127888.html

http://www.cnblogs.com/lostyu/p/3528785.html

http://www.hiheng.com/blog/archives/1088

http://tympanus.net/Tutorials/CSS3FilterFunctionality/index3.html