.myloading_mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background-color: #000000;
    filter: alpha(opacity=30);
    /* IE */
    -moz-opacity: 0.3;
    /* 老版Mozilla */
    -khtml-opacity: 0.3;
    /* 老版Safari */
    opacity: 0.3;
    /* 支持opacity的浏览器*/
}

.myloading img {
        width: 48px;
        height: 48px;
}

.myloading-bg {
    position: fixed;
    top: 50%;
    left: 50%;
    margin: -51px 0 0 -141px;
    width: 280px;
    height: 100px;
    z-index: 9999;
    background-color: #fff;
    border: 1px solid #CCC;
    border-radius: 4px;
    text-align: center;
}
@media (min-width: 768px) {
    .myloading-bg {
        position: fixed;
        top: 50%;
        left: 50%;
        margin: -51px 0 0 -291px;
        width: 580px;
        height: 120px;
        z-index: 9999;
        background-color: #fff;
        border: 1px solid #CCC;
        border-radius: 4px;
        text-align: center;
    }

        .myloading-bg img {
            margin-top: 17px;
            width: 60px;
            height: 60px;
        }
}