    @mixin extjs-messagebox {
        .#{$prefix}message-box .#{$prefix}window-body {
            background-color: $window-background-color;
            border: none;
        }

        .#{$prefix}message-box .#{$prefix}progress-wrap {
            margin-top: 4px;
        }

        .#{$prefix}message-box-info,
        .#{$prefix}message-box-warning,
        .#{$prefix}message-box-question,
        .#{$prefix}message-box-error {
            background: transparent no-repeat top left;
        }

        @if $include-rtl {
            .#{$prefix}rtl {
                &.#{$prefix}message-box-info,
                &.#{$prefix}message-box-warning,
                &.#{$prefix}message-box-question,
                &.#{$prefix}message-box-error {
                    background-position: top right;
                }
            }
        }

        .#{$prefix}message-box .#{$prefix}msg-box-wait {
            background-image: theme-background-image($theme-name, 'shared/blue-loading.gif');
        }

        .#{$prefix}message-box-info {
            background-image: theme-background-image($theme-name, 'shared/icon-info.gif');
        }

        .#{$prefix}message-box-warning {
            background-image: theme-background-image($theme-name, 'shared/icon-warning.gif');
        }

        .#{$prefix}message-box-question {
            background-image: theme-background-image($theme-name, 'shared/icon-question.gif');
        }

        .#{$prefix}message-box-error {
            background-image: theme-background-image($theme-name, 'shared/icon-error.gif');
        }
    }