CSS实现全站黑白色

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: grayscale(100%); 
}