jQuery.BlackAndWhite

This plug-in can easily convert any colored image (in an html page) into a B&W greyscale image.

https://cdnjs.webstatic.cn/ajax/libs/jQuery.BlackAndWhite/0.3.8/jquery.BlackAndWhite.js
https://cdnjs.webstatic.cn/ajax/libs/jQuery.BlackAndWhite/0.3.8/jquery.BlackAndWhite.min.js