网站变灰

样式中加上...即可

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;  

    }