HTML图片置灰（一般用于奖品被领取后）

.gray {     -webkit-filter: grayscale(50%);    -moz-filter: grayscale(50%);    -ms-filter: grayscale(50%);    -o-filter: grayscale(50%);    filter: grayscale(50%);    filter: gray;    margin:0.50rem 0rem 0.2rem 0rem;    border-radius:0.2rem}

被领取后的js方法设置以上样式即可

document.getElementById("id").setAttribute('class','gray');