.z_dropdown {
    position: relative;
    margin: 0.5rem auto;
}

    .z_dropdown input {
        border: 1px solid #808080;
        padding-left: 5px;
        width: 200px;
        cursor: pointer;
    }

    .z_dropdown .down {
        position: absolute;
        right: 5px;
        z-index: 100;
        background: url('../Image/down.png');
        width: 11px;
        height: 7px;
        top: 13px;
        cursor: pointer;
    }

    .z_dropdown ul {
        position: absolute;
        background-color: #fff;
        z-index: 1000;
        width: 100%;
        border: 1px solid #ccc;
        top: 32px;
        left: 0;
        max-height:260px;
        overflow:auto;
    }

    .z_dropdown li {
        font-size: 12px;
        text-align: center;
        line-height: 24px;
        cursor: pointer;
    }

        .z_dropdown li:hover,.z_dropdown li.sel {
            background-color: #0094ff;
        }

    .z_dropdown .rhint{
        color:red;
    }