/*
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:gray;
}
*{
    -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:gray;
}
*/