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');