/*灰色 begin*/
/*
body,html { 
filter: grayscale(100%);
-webkit-filter: grayscale(100%);
-moz-filter: grayscale(100%);
-ms-filter: grayscale(100%);
-o-filter: grayscale(100%);
filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
-webkit-filter: grayscale(1);
filter: gray
}
img,* { filter:gray \9; /* just for IE6-9 */ }  
/*灰色 end*/