/*灰遮罩*/
.cover{
    position: absolute;
    left: 0;
    top: 0;
    display: block;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: 0.8;
    filter: alpha(opacity=50);
    overflow: hidden;
}
/*提示浮层小*/
.layer{
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 1001;
    display: none;
}
.layer .close{
    background: url(../images/layer-close.png) no-repeat;
    width: 20px;
    height: 20px;
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 3;
}
.layer-tip{
    background: #fff;
    font-size: 14px;
    line-height: 24px;
    padding: 50px 30px 30px;
    position: absolute;
    top: 50%;
    left: 50%;
    text-align: center;
    min-height: 100px;
    width: 370px;
    margin: -120px 0 0 -215px;
    -moz-border-radius: 2px;
    -webkit-border-radius: 2px;
    border-radius: 2px;
    overflow: hidden;
}