Page black and white style

Page black and white style:

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