.fill-all () {
    // 占满空间
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

.ui-uploader {
    position: relative;

    .ui-uploader-input-container {
        position: relative;
        display: inline-block;
        *display: inline;
        zoom: 1;
        margin: 0; // 重置IE6-7
        font-size: 12px;
        overflow: hidden;
    }

    .ui-uploader-button {
        .fill-all ();
        background-image: -webkit-linear-gradient(top, #fff, #f6f6f6);
        background-image: -moz-linear-gradient(top, #fff, #f6f6f6);
        background-image: -ms-linear-gradient(top, #fff, #f6f6f6);
        background-image: -o-linear-gradient(top, #fff, #f6f6f6);
        background-image: linear-gradient(top, #fff, #f6f6f6);
        background-color: #fff;
        border: 1px solid #CCC;
        border-radius: 3px;
        vertical-align: top;
        text-align: center;
        display: block;
    }

    input {
        opacity: 0;
        filter: alpha(opacity=0);
        .fill-all ();
        z-index: 1;
        border: 0;
        padding: 0;
        margin: 0;
        width: 100px;
        cursor: pointer;

        &::-webkit-file-upload-button {
            cursor: pointer;
        }
    }

    iframe {
        display: none;
    }

    .ui-uploader-indicator {
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        display: none;
        text-align: center;
        padding-left: 18px;
    }

    .ui-uploader-extra-args {
        display: none;
    }
}

.ui-uploader-busy {
    input,
    .ui-uploader-button {
        display: none;
    }

    .ui-uploader-indicator {
        background: url('../img/upload-progress.gif') no-repeat 0 3px;
        display: block;
    }
}

// 装了`ModernUpload`扩展以后的效果
.ui-uploader-droppable,
.ui-uploader-accepting {

    .ui-uploader-button {
        display: none;
    }

    .ui-uploader-indicator {
        display: table;

        span {
            display: table-cell;
            vertical-align: middle;
            line-height: normal !important;
            border: 2px dashed green;
            border-radius: 6px;
        }
    }
}

.ui-uploader-progress {
    .ui-uploader-indicator {
        background-image: none;
        background-color: #3892e3;

        span {
            display: none;
        }
    }
}

.ui-uploader-label {
    height: 25px;
    margin-left: 10px;
    float: right;
    color: #666;
}

.ui-uploader-uploaded {
    .ui-uploader-label {
        padding-left: 28px;
        background: url(../img/upload-success.png) no-repeat;
    }
}

.ui-uploader-validity-label {
    float: left;
    margin-left: 10px;
    color: #CC0000
}

.ui-uploader-read-only,
.ui-uploader-disabled {
    cursor: not-allowed;

    .ui-uploader-button {
        background-image: none;
        background-color: #f6f6f6;
        color: #999;
        cursor: not-allowed;
    }

    input,
    input::-webkit-file-upload-button {
        cursor: not-allowed;
    }
}