    /**
     * Creates the base structure of an Ext.Button
     * @member Ext.button.Button
     */
    @mixin extjs-button {
        .#{$prefix}btn {
            display: inline-block;
            zoom: 1;
            *display: inline;
            position: relative;

            cursor: pointer;
            cursor: hand;

            white-space: nowrap;

            vertical-align: middle;

            * {
                cursor: pointer;
                cursor: hand;
            }

            background-repeat: no-repeat;

            em {
                background-repeat: no-repeat;

                // Styles for an anchor button.
                a {
                    text-decoration: none;
                    display: block;
                    color: inherit;

                    // 100% rather than auto for consistency with the button element
                    width: 100%;

                    // This is needed for IE7 in strict mode to ensure that the icon element has the correct opacity on a
                    // disabled link button. It seems only to be needed for buttons that are narrower than their icon
                    // element
                    zoom: 1;
                }
            }

            button {
                // 100% rather than auto so that IE7 renders file upload and date picker buttons correctly
                width: 100%;

                display: block;
                margin: 0;
                padding: 0;
                border: 0;
                background: none;
                outline: 0 none;
                overflow: hidden;
                vertical-align: bottom;
                -webkit-appearance: none;

                &::-moz-focus-inner {
                    border: 0;
                    padding: 0;
                }
            }

            .#{$prefix}btn-inner {
                display: block;
                white-space: nowrap;
                background-color: transparent;
                background-repeat: no-repeat;
                background-position: left center;
                overflow: hidden;
            }

            .#{$prefix}btn-left .#{$prefix}btn-inner {
                text-align: left;
            }

            .#{$prefix}btn-center .#{$prefix}btn-inner {
                text-align: center;
            }

            .#{$prefix}btn-right .#{$prefix}btn-inner {
                text-align: right;
            }
        }

        .#{$prefix}btn-disabled span {
            @include opacity(.5);

            .#{$prefix}ie6 &,
            .#{$prefix}ie7 & {
                filter:none;
            }
        }

        //remove the opacity rule of IE8
        .#{$prefix}ie7 .#{$prefix}btn-disabled,
        .#{$prefix}ie8 .#{$prefix}btn-disabled {
            filter:none;
        }

        .#{$prefix}ie6 .#{$prefix}btn-disabled,
        .#{$prefix}ie7 .#{$prefix}btn-disabled,
        .#{$prefix}ie8 .#{$prefix}btn-disabled {
            .#{$prefix}btn-icon {
                @include opacity(.6);
            }
        }

        @if $include-ie {
            /* IE9 shows scrollbars in a button unless this is set  */
            .#{$prefix}ie9 .#{$prefix}btn button {
                overflow: visible!important;
            }

            * html .#{$prefix}ie {
                .#{$prefix}btn button {
                    width: 1px;
                }
            }

            .#{$prefix}ie .#{$prefix}btn button {
                overflow-x: visible; /*prevents extra horiz space in IE*/
                vertical-align: baseline; /*IE doesn't like bottom*/
            }

            .#{$prefix}strict .#{$prefix}ie6,
            .#{$prefix}strict .#{$prefix}ie7 {
                .#{$prefix}btn .#{$prefix}frame-mc {
                    height: 100%;
                }
            }
        }

        @if not $supports-border-radius or $compile-all {
            /* Keep the selector simple ".x-btn .x-frame-mc" is enough to target the center frame of the button table */
            .#{$prefix}btn {
                .#{$prefix}frame-mc {
                    vertical-align: middle;
                    white-space: nowrap;
                    cursor: pointer;
                }
            }

            /* Only center when all there is is text. Otherwise solo icons get centered. */
            .#{$prefix}btn-noicon {
                .#{$prefix}frame-mc {
                    text-align: center;
                }
            }
        }

        .#{$prefix}btn-icon-text-left .#{$prefix}btn-icon {
            background-position: left center;
        }

        .#{$prefix}btn-icon-text-right .#{$prefix}btn-icon {
            background-position: right center;
        }

        .#{$prefix}btn-icon-text-top .#{$prefix}btn-icon {
            background-position: center top;
        }

        .#{$prefix}btn-icon-text-bottom .#{$prefix}btn-icon {
            background-position: center bottom;
        }

        .#{$prefix}btn {
            button, a {
                position: relative;

                .#{$prefix}btn-icon {
                    position: absolute;
                    background-repeat: no-repeat;
                }
            }
        }

        .#{$prefix}btn-arrow-right {
            background: transparent no-repeat right center;
            padding-right: $button-arrow-size;

            .#{$prefix}btn-inner {
                padding-right: 0 !important;
            }
        }

        .#{$prefix}toolbar .#{$prefix}btn-arrow-right {
            padding-right: $button-toolbar-arrow-size;
        }

        .#{$prefix}btn-arrow-bottom {
            background: transparent no-repeat center bottom;
            padding-bottom: $button-arrow-size;
        }

        .#{$prefix}btn-arrow {
            background-image: theme-background-image($theme-name, 'button/arrow.gif');
            display: block;
        }

        //split buttons
        .#{$prefix}btn-split-right,
        .#{$prefix}btn-over .#{$prefix}btn-split-right {
            background: transparent no-repeat right center;
            background-image: theme-background-image($theme-name, 'button/s-arrow.gif');
            padding-right: $button-split-size !important;
        }

        .#{$prefix}btn-split-bottom,
        .#{$prefix}btn-over .#{$prefix}btn-split-bottom {
            background: transparent no-repeat center bottom;
            background-image: theme-background-image($theme-name, 'button/s-arrow-b.gif');
            padding-bottom: $button-split-size;
        }

        .#{$prefix}toolbar .#{$prefix}btn-split-right {
            background-image: theme-background-image($theme-name, 'button/s-arrow-noline.gif');
            padding-right: $button-toolbar-split-size !important;
        }

        .#{$prefix}toolbar .#{$prefix}btn-split-bottom {
            background-image: theme-background-image($theme-name, 'button/s-arrow-b-noline.gif');
        }

        .#{$prefix}btn-split {
            display: block;
        }

        .#{$prefix}item-disabled,
        .#{$prefix}item-disabled * {
            cursor: default;
        }

        .#{$prefix}cycle-fixed-width .#{$prefix}btn-inner {
            text-align: inherit;
        }

        .#{$prefix}btn-over .#{$prefix}btn-split-right { background-image: theme-background-image($theme-name, 'button/s-arrow-o.gif'); }
        .#{$prefix}btn-over .#{$prefix}btn-split-bottom { background-image: theme-background-image($theme-name, 'button/s-arrow-bo.gif'); }

        @include extjs-button-ui(
            /* UI + Scale */
            'default-small',

            $button-small-border-radius,
            $button-small-border-width,

            $button-default-border-color,
            $button-default-border-color-over,
            $button-default-border-color-focus,
            $button-default-border-color-pressed,
            $button-default-border-color-disabled,

            $button-small-padding,
            $button-small-text-padding,

            $button-default-background-color,
            $button-default-background-color-over,
            $button-default-background-color-focus,
            $button-default-background-color-pressed,
            $button-default-background-color-disabled,

            $button-default-background-gradient,
            $button-default-background-gradient-over,
            $button-default-background-gradient-focus,
            $button-default-background-gradient-pressed,
            $button-default-background-gradient-disabled,

            $button-default-color,
            $button-default-color-over,
            $button-default-color-focus,
            $button-default-color-pressed,
            $button-default-color-disabled,

            $button-small-font-size,
            $button-small-font-size-over,
            $button-small-font-size-focus,
            $button-small-font-size-pressed,
            $button-small-font-size-disabled,

            $button-small-font-weight,
            $button-small-font-weight-over,
            $button-small-font-weight-focus,
            $button-small-font-weight-pressed,
            $button-small-font-weight-disabled,

            $button-small-font-family,
            $button-small-font-family-over,
            $button-small-font-family-focus,
            $button-small-font-family-pressed,
            $button-small-font-family-disabled,

            $button-small-icon-size
        );

        @include extjs-button-ui(
            'default-medium',

            $button-medium-border-radius,
            $button-medium-border-width,

            $button-default-border-color,
            $button-default-border-color-over,
            $button-default-border-color-focus,
            $button-default-border-color-pressed,
            $button-default-border-color-disabled,

            $button-medium-padding,
            $button-medium-text-padding,

            $button-default-background-color,
            $button-default-background-color-over,
            $button-default-background-color-focus,
            $button-default-background-color-pressed,
            $button-default-background-color-disabled,

            $button-default-background-gradient,
            $button-default-background-gradient-over,
            $button-default-background-gradient-focus,
            $button-default-background-gradient-pressed,
            $button-default-background-gradient-disabled,

            $button-default-color,
            $button-default-color-over,
            $button-default-color-focus,
            $button-default-color-pressed,
            $button-default-color-disabled,

            $button-medium-font-size,
            $button-medium-font-size-over,
            $button-medium-font-size-focus,
            $button-medium-font-size-pressed,
            $button-medium-font-size-disabled,

            $button-medium-font-weight,
            $button-medium-font-weight-over,
            $button-medium-font-weight-focus,
            $button-medium-font-weight-pressed,
            $button-medium-font-weight-disabled,

            $button-medium-font-family,
            $button-medium-font-family-over,
            $button-medium-font-family-focus,
            $button-medium-font-family-pressed,
            $button-medium-font-family-disabled,

            $button-medium-icon-size
        );

        @include extjs-button-ui(
            'default-large',

            $button-large-border-radius,
            $button-large-border-width,

            $button-default-border-color,
            $button-default-border-color-over,
            $button-default-border-color-focus,
            $button-default-border-color-pressed,
            $button-default-border-color-disabled,

            $button-large-padding,
            $button-large-text-padding,

            $button-default-background-color,
            $button-default-background-color-over,
            $button-default-background-color-focus,
            $button-default-background-color-pressed,
            $button-default-background-color-disabled,

            $button-default-background-gradient,
            $button-default-background-gradient-over,
            $button-default-background-gradient-focus,
            $button-default-background-gradient-pressed,
            $button-default-background-gradient-disabled,

            $button-default-color,
            $button-default-color-over,
            $button-default-color-focus,
            $button-default-color-pressed,
            $button-default-color-disabled,

            $button-large-font-size,
            $button-large-font-size-over,
            $button-large-font-size-focus,
            $button-large-font-size-pressed,
            $button-large-font-size-disabled,

            $button-large-font-weight,
            $button-large-font-weight-over,
            $button-large-font-weight-focus,
            $button-large-font-weight-pressed,
            $button-large-font-weight-disabled,

            $button-large-font-family,
            $button-large-font-family-over,
            $button-large-font-family-focus,
            $button-large-font-family-pressed,
            $button-large-font-family-disabled,

            $button-large-icon-size
        );

        @include extjs-button-ui(
            'default-toolbar-small',

            $button-small-border-radius,
            $button-small-border-width,

            $button-toolbar-border-color,
            $button-toolbar-border-color-over,
            $button-toolbar-border-color-focus,
            $button-toolbar-border-color-pressed,
            $button-toolbar-border-color-disabled,

            $button-small-padding,
            $button-small-text-padding,

            $button-toolbar-background-color,
            $button-toolbar-background-color-over,
            $button-toolbar-background-color-focus,
            $button-toolbar-background-color-pressed,
            $button-toolbar-background-color-disabled,

            $button-toolbar-background-gradient,
            $button-toolbar-background-gradient-over,
            $button-toolbar-background-gradient-focus,
            $button-toolbar-background-gradient-pressed,
            $button-toolbar-background-gradient-disabled,

            $button-toolbar-color,
            $button-toolbar-color-over,
            $button-toolbar-color-focus,
            $button-toolbar-color-pressed,
            $button-toolbar-color-disabled,

            $button-small-font-size,
            $button-small-font-size-over,
            $button-small-font-size-focus,
            $button-small-font-size-pressed,
            $button-small-font-size-disabled,

            $button-small-font-weight,
            $button-small-font-weight-over,
            $button-small-font-weight-focus,
            $button-small-font-weight-pressed,
            $button-small-font-weight-disabled,

            $button-small-font-family,
            $button-small-font-family-over,
            $button-small-font-family-focus,
            $button-small-font-family-pressed,
            $button-small-font-family-disabled,

            $button-small-icon-size
        );

        @include extjs-button-ui(
            'default-toolbar-medium',

            $button-medium-border-radius,
            $button-medium-border-width,

            $button-toolbar-border-color,
            $button-toolbar-border-color-over,
            $button-toolbar-border-color-focus,
            $button-toolbar-border-color-pressed,
            $button-toolbar-border-color-disabled,

            $button-medium-padding,
            $button-medium-text-padding,

            $button-toolbar-background-color,
            $button-toolbar-background-color-over,
            $button-toolbar-background-color-focus,
            $button-toolbar-background-color-pressed,
            $button-toolbar-background-color-disabled,

            $button-toolbar-background-gradient,
            $button-toolbar-background-gradient-over,
            $button-toolbar-background-gradient-focus,
            $button-toolbar-background-gradient-pressed,
            $button-toolbar-background-gradient-disabled,

            $button-toolbar-color,
            $button-toolbar-color-over,
            $button-toolbar-color-focus,
            $button-toolbar-color-pressed,
            $button-toolbar-color-disabled,

            $button-medium-font-size,
            $button-medium-font-size-over,
            $button-medium-font-size-focus,
            $button-medium-font-size-pressed,
            $button-medium-font-size-disabled,

            $button-medium-font-weight,
            $button-medium-font-weight-over,
            $button-medium-font-weight-focus,
            $button-medium-font-weight-pressed,
            $button-medium-font-weight-disabled,

            $button-medium-font-family,
            $button-medium-font-family-over,
            $button-medium-font-family-focus,
            $button-medium-font-family-pressed,
            $button-medium-font-family-disabled,

            $button-medium-icon-size
        );

        @include extjs-button-ui(
            'default-toolbar-large',

            $button-large-border-radius,
            $button-large-border-width,

            $button-toolbar-border-color,
            $button-toolbar-border-color-over,
            $button-toolbar-border-color-focus,
            $button-toolbar-border-color-pressed,
            $button-toolbar-border-color-disabled,

            $button-large-padding,
            $button-large-text-padding,

            $button-toolbar-background-color,
            $button-toolbar-background-color-over,
            $button-toolbar-background-color-focus,
            $button-toolbar-background-color-pressed,
            $button-toolbar-background-color-disabled,

            $button-toolbar-background-gradient,
            $button-toolbar-background-gradient-over,
            $button-toolbar-background-gradient-focus,
            $button-toolbar-background-gradient-pressed,
            $button-toolbar-background-gradient-disabled,

            $button-toolbar-color,
            $button-toolbar-color-over,
            $button-toolbar-color-focus,
            $button-toolbar-color-pressed,
            $button-toolbar-color-disabled,

            $button-large-font-size,
            $button-large-font-size-over,
            $button-large-font-size-focus,
            $button-large-font-size-pressed,
            $button-large-font-size-disabled,

            $button-large-font-weight,
            $button-large-font-weight-over,
            $button-large-font-weight-focus,
            $button-large-font-weight-pressed,
            $button-large-font-weight-disabled,

            $button-large-font-family,
            $button-large-font-family-over,
            $button-large-font-family-focus,
            $button-large-font-family-pressed,
            $button-large-font-family-disabled,

            $button-large-icon-size
        );

        .#{$prefix}btn-default-toolbar-small-disabled,
        .#{$prefix}btn-default-toolbar-medium-disabled,
        .#{$prefix}btn-default-toolbar-large-disabled {
            border-color: transparent;

            background-image: none;
            background: transparent;
        }
    }

    /**
     * Creates a visual theme of an Ext.Button
     * @member Ext.button.Button
     */
    @mixin extjs-button-ui(
        $ui,

        $border-radius: 0px,

        $border-width: 0px,

        $border-color: null,
        $border-color-over: null,
        $border-color-focus: null,
        $border-color-pressed: null,
        $border-color-disabled: null,

        $padding: null,
        $text-padding: null,

        $background-color: null,
        $background-color-over: null,
        $background-color-focus: null,
        $background-color-pressed: null,
        $background-color-disabled: null,

        $background-gradient: null,
        $background-gradient-over: null,
        $background-gradient-focus: null,
        $background-gradient-pressed: null,
        $background-gradient-disabled: null,

        $color: null,
        $color-over: null,
        $color-focus: null,
        $color-pressed: null,
        $color-disabled: null,

        $font-size: null,
        $font-size-over: null,
        $font-size-focus: null,
        $font-size-pressed: null,
        $font-size-disabled: null,

        $font-weight: null,
        $font-weight-over: null,
        $font-weight-focus: null,
        $font-weight-pressed: null,
        $font-weight-disabled: null,

        $font-family: null,
        $font-family-over: null,
        $font-family-focus: null,
        $font-family-pressed: null,
        $font-family-disabled: null,

        $icon-size: null
    ) {
        .#{$prefix}btn-#{$ui} {
            border-color: $border-color;
        }

        @include x-frame('btn', $ui, $border-radius, $border-width, $padding, $background-color, $background-gradient, true);

        .#{$prefix}btn-#{$ui} .#{$prefix}btn-inner {
            font-size: $font-size;
            font-weight: $font-weight;
            font-family: $font-family;
            color: $color;
            background-repeat: no-repeat;
            padding: 0 $text-padding;
        }

        .#{$prefix}btn-#{$ui}-icon,
        .#{$prefix}btn-#{$ui}-noicon {
            button,
            a,
            .#{$prefix}btn-inner {
                height: $icon-size;
                line-height: $icon-size;
            }
        }

        //icons
        .#{$prefix}btn-#{$ui}-icon {
            button,
            a {
                padding: 0;
            }

            .#{$prefix}btn-inner {
                /* even though there is no text we set a width and padding as buttons shrink-wrap around this element */
                width: $icon-size;
                padding: 0;
            }

            .#{$prefix}btn-icon {
                width: $icon-size;
                height: $icon-size;
                top: 0;
                left: 0;
                bottom: 0;
                right: 0;
            }
        }

        .#{$prefix}btn-#{$ui}-icon-text-left {
            button,
            a {
                height: $icon-size;
            }
            .#{$prefix}btn-inner {
                height: $icon-size;
                line-height: $icon-size;
                padding-left: $icon-size + 4px;
            }

            .#{$prefix}btn-icon {
                width: $icon-size;
                height: auto;
                top: 0;
                left: 0;
                bottom: 0;
                right: auto;

                .#{$prefix}ie6 &,
                .#{$prefix}quirks & {
                    height: $icon-size;
                }
            }
        }

        .#{$prefix}btn-#{$ui}-icon-text-right {
            button,
            a {
                height: $icon-size;
            }
            .#{$prefix}btn-inner {
                height: $icon-size;
                line-height: $icon-size;
                padding-right: $icon-size + 4px !important;
            }

            .#{$prefix}btn-icon {
                width: $icon-size;
                height: auto;
                top: 0;
                left: auto;
                bottom: 0;
                right: 0;

                .#{$prefix}ie6 &,
                .#{$prefix}quirks & {
                    height: $icon-size;
                }
            }
        }

        .#{$prefix}btn-#{$ui}-icon-text-top {
            .#{$prefix}btn-inner {
                padding-top: $icon-size + 4px;
            }

            .#{$prefix}btn-icon {
                width: auto;
                height: $icon-size;
                top: 0;
                left: 0;
                bottom: auto;
                right: 0;

                .#{$prefix}ie6 &,
                .#{$prefix}quirks .#{$prefix}ie & {
                    width: $icon-size;
                }
            }
        }

        .#{$prefix}btn-#{$ui}-icon-text-bottom {
            .#{$prefix}btn-inner {
                padding-bottom: $icon-size + 4px;
            }

            .#{$prefix}btn-icon {
                width: auto;
                height: $icon-size;
                top: auto;
                left: 0;
                bottom: 0;
                right: 0;

                .#{$prefix}ie6 &,
                .#{$prefix}quirks .#{$prefix}ie & {
                    width: $icon-size;
                }
            }
        }

        .#{$prefix}btn-#{$ui}-over {
            @if $border-color-over != $border-color {
                border-color: $border-color-over;
            }
            @if $background-color-over != null {
                @include background-gradient($background-color-over, $background-gradient-over);
            }

            .#{$prefix}btn-inner {
                @if $color-over != $color {
                    color: $color-over;
                }
                @if $font-weight-over != $font-weight {
                    font-weight: $font-weight-over;
                }
                @if $font-size-over != $font-size {
                    font-size: $font-size-over;
                }
                @if $font-family-over != $font-family {
                    font-family: $font-family-over;
                }
            }
        }

        .#{$prefix}btn-#{$ui}-focus {
            @if $border-color-focus != $border-color {
                border-color: $border-color-focus;
            }
            @if $background-color-focus != null {
                @include background-gradient($background-color-focus, $background-gradient-focus);
            }

            .#{$prefix}btn-inner {
                @if $color-focus != $color {
                    color: $color-focus;
                }
                @if $font-weight-focus != $font-weight {
                    font-weight: $font-weight-focus;
                }
                @if $font-size-focus != $font-size {
                    font-size: $font-size-focus;
                }
                @if $font-family-focus != $font-family {
                    font-family: $font-family-focus;
                }
            }
        }

        .#{$prefix}btn-#{$ui}-menu-active,
        .#{$prefix}btn-#{$ui}-pressed {
            @if $border-color-pressed != $border-color {
                border-color: $border-color-pressed;
            }
            @if $background-color-pressed != null {
                @include background-gradient($background-color-pressed, $background-gradient-pressed);
            }

            .#{$prefix}btn-inner {
                @if $color-pressed != $color {
                    color: $color-pressed;
                }
                @if $font-weight-pressed != $font-weight {
                    font-weight: $font-weight-pressed;
                }
                @if $font-size-pressed != $font-size {
                    font-size: $font-size-pressed;
                }
                @if $font-family-pressed != $font-family {
                    font-family: $font-family-pressed;
                }
            }
        }

        .#{$prefix}btn-#{$ui}-disabled {
            @if $border-color-disabled != $border-color {
                border-color: $border-color-disabled;
            }
            @if $background-color-disabled != null {
                @include background-gradient($background-color-disabled, $background-gradient-disabled);
            }

            .#{$prefix}btn-inner {
                @if $color-disabled != $color {
                    color: $color !important;
                }
                @if $font-weight-disabled != $font-weight {
                    font-weight: $font-weight-disabled;
                }
                @if $font-size-disabled != $font-size {
                    font-size: $font-size-disabled;
                }
                @if $font-family-disabled != $font-family {
                    font-family: $font-family-disabled;
                }
            }
        }

        .#{$prefix}ie .#{$prefix}btn-#{$ui}-disabled {
            .#{$prefix}btn-inner {
                @if $color-disabled != $color {
                    color: darken($color-disabled, 20) !important;
                }
            }
        }

        .#{$prefix}ie6 .#{$prefix}btn-#{$ui}-disabled {
            .#{$prefix}btn-inner {
                @if $color-disabled != $color {
                    color: $color-disabled !important;
                }
            }
        }

        @if not $supports-border-radius or $compile-all {
            .#{$prefix}nbr {
                .#{$prefix}btn-#{$ui}-over {
                    .#{$prefix}frame-tl,
                    .#{$prefix}frame-bl,
                    .#{$prefix}frame-tr,
                    .#{$prefix}frame-br,
                    .#{$prefix}frame-tc,
                    .#{$prefix}frame-bc {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-over-corners.gif');
                    }
                    .#{$prefix}frame-ml,
                    .#{$prefix}frame-mr {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-over-sides.gif');
                    }
                    .#{$prefix}frame-mc {
                        background-color: $background-color-over;
                        @if $background-gradient-over != null {
                            background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-over-bg.gif');
                        }
                    }
                }

                .#{$prefix}btn-#{$ui}-focus {
                    .#{$prefix}frame-tl,
                    .#{$prefix}frame-bl,
                    .#{$prefix}frame-tr,
                    .#{$prefix}frame-br,
                    .#{$prefix}frame-tc,
                    .#{$prefix}frame-bc {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-focus-corners.gif');
                    }
                    .#{$prefix}frame-ml,
                    .#{$prefix}frame-mr {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-focus-sides.gif');
                    }
                    .#{$prefix}frame-mc {
                        background-color: $background-color-focus;
                        @if $background-gradient-focus != null {
                            background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-focus-bg.gif');
                        }
                    }
                }

                .#{$prefix}btn-#{$ui}-menu-active,
                .#{$prefix}btn-#{$ui}-pressed {
                    .#{$prefix}frame-tl,
                    .#{$prefix}frame-bl,
                    .#{$prefix}frame-tr,
                    .#{$prefix}frame-br,
                    .#{$prefix}frame-tc,
                    .#{$prefix}frame-bc {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-pressed-corners.gif');
                    }
                    .#{$prefix}frame-ml,
                    .#{$prefix}frame-mr {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-pressed-sides.gif');
                    }
                    .#{$prefix}frame-mc {
                        background-color: $background-color-pressed;
                        @if $background-gradient-pressed != null {
                            background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-pressed-bg.gif');
                        }
                    }
                }

                .#{$prefix}btn-#{$ui}-disabled {
                    .#{$prefix}frame-tl,
                    .#{$prefix}frame-bl,
                    .#{$prefix}frame-tr,
                    .#{$prefix}frame-br,
                    .#{$prefix}frame-tc,
                    .#{$prefix}frame-bc {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-disabled-corners.gif');
                    }
                    .#{$prefix}frame-ml,
                    .#{$prefix}frame-mr {
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-disabled-sides.gif');
                    }
                    .#{$prefix}frame-mc {
                        background-color: $background-color-disabled;
                        @if $background-gradient-disabled != null {
                            background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-disabled-bg.gif');
                        }
                    }
                }
            }
        }

        @if not $supports-gradients or $compile-all {
            @if $background-gradient != null {
                .#{$prefix}nlg {
                    .#{$prefix}btn-#{$ui} {
                        background-repeat: repeat-x;
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-bg.gif');
                    }
                }
            }

            @if $background-gradient-over != null {
                .#{$prefix}nlg {
                    .#{$prefix}btn-#{$ui}-over {
                        background-repeat: repeat-x;
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-over-bg.gif');
                    }
                }
            }

            @if $background-gradient-focus != null {
                .#{$prefix}nlg {
                    .#{$prefix}btn-#{$ui}-focus {
                        background-repeat: repeat-x;
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-focus-bg.gif');
                    }
                }
            }

            @if $background-gradient-pressed != null {
                .#{$prefix}nlg {
                    .#{$prefix}btn-#{$ui}-menu-active,
                    .#{$prefix}btn-#{$ui}-pressed {
                        background-repeat: repeat-x;
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-pressed-bg.gif');
                    }
                }
            }

            @if $background-gradient-disabled != null {
                .#{$prefix}nlg {
                    .#{$prefix}btn-#{$ui}-disabled {
                        background-repeat: repeat-x;
                        background-image: theme-background-image($theme-name, 'btn/btn-#{$ui}-disabled-bg.gif');
                    }
                }
            }
        }
    };