Mourning compatriots who died in the disaster: methods for websites to turn gray

The great earthquake in Sichuan Wenchuan has touched the hearts of all Chinese people. May 19-21 is the national mourning day. As a part of the Internet, and as a webmaster, we can express our condolences to the compatriots who lost their lives in the disaster area in a special way—by turning our web pages into black-and-white style using CSS filters!

Beichen Tip: By adding the following code to your CSS file, your webpage will be transformed into a black-and-white style.