网站灰色代码

 html 
{         
-webkit-filter: grayscale(100%);         
-moz-filter: grayscale(100%);         
-ms-filter: grayscale(100%);         
-o-filter: grayscale(100%);         
filter:progid:
DXImageTransform.Microsoft.BasicImage(grayscale=1);          
  _filter:none;     
}