Today is the national day of mourning, and the Web pages are grayed out! How to do this ?!

Today is the national day of mourning! Less than two years after the last 5.12 Earthquakes! China has encountered another earthquake! 4.14 Yushu magnitude 7.1 earthquake.

God bless China, and I would like to express my deep condolences to our lost compatriots !!!

Open the website today! Many websites are gray! They all mourn for the dead compatriot! How is that done?

<% @ Page Language = "C #" %> <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat = "server"> </script>  * {Filter: Gray ;}// Filter effect! IE support, FF does not support </style> 
Replace the above image with your image! You can see the effect after running it!
  
The first is the IE running effect, and the second is the FF running effect!
 
May the dead rest in peace! It is better to have a living person!