首先得选一个你喜欢的图片，然后去下面的网站压缩成16*16的.
http://favicon.htmlkit.com/favicon/
将生成的压缩包下载下来，上传到自己网站的根目录.
生成的压缩包里面包含3个文件（favicon.ico ，animated_favicon1.gif ， ReadMe.txt）
其实他的ReadMe.txt说明文档写的很详细，这里我把它贴出来.
A. Installing the favicon with animation (动态的图标)
B. Installing the favicon without animation （非动态的图标）
C. What’s in this favicon.ico （favicon.ico里面包含什么）
D. More Information
E. Thank You
— A. Installing the favicon with animation —
1. Upload favicon.ico and animated_favicon1.gif to the root of your web folder. （把这两个文件上传到网站根目录）
2. Add the following HTML code to your web page, in between and tags: （在head.php 文件中加入以下两行代码，必须加在 和 之间，改完之后就大功告成了，是不是非常简单啊）
— B. Installing the favicon without animation — （同上，只是这个是非动态的）
1. Upload favicon.ico to the root of your web folder.
2. Add the following HTML code to your web page, in between and tags:
— C. What’s in this favicon.ico —
The favicon.ico in this package has 2 image formats in a single file:（favicon.ico包含两个图片，一个是 16*16寸的，一个是32*32寸的）
16*16-pixel 256-color and 32*32-pixel 256-color.
— D. More Information — （更多关于这个网站的信息）
* FavIcon from Pics homepage:
http://favicon.htmlkit.com/favicon/
* If you would like to double check the installation of your favicon, visit:
http://www.htmlkit.com/go/favicon/validator/
* Answers to frequently asked questions and support forums:
http://www.htmlkit.com/go/favicon/help/
* Find out about upcoming features with the RSS news feed:
http://favicon.htmlkit.com/favicon/feed/
— E. Thank You —
Thank you for using FavIcon from Pics!
If you like this service, a link to http://favicon.htmlkit.com/ is appreciated.
For more web developer tools, visit http://www.htmlkit.com/