/*网页灰度控制*/
  /* 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; 
    } */
/*网页灰度控制结束*/