.MaarchTreeRoot {

    ul {
        list-style-type: none;
        margin-left:8px;
        padding-left:9px;

        ul {
            border-left: dotted 1px gray;
        }
    }

    li {
        background: {
            color: inherit;
            repeat: no-repeat;
            position: top left;
        }

        img {
            display: none;
            width : 18px;
            height : 18px;
        }

        &:last-child {

            ul {
                border-left: none;
            }
        }

        img {
            vertical-align: middle;
        }
    }
}

.mt_opened {
    ul {
        display: block;
    }

    & > span {
        /* Dossier ouvert  */
        .mt_fopened {
            display: inline;
        }

        /* Dossier ouvert : enfants potentiels */
        .mt_minus {
            display: inline;
        }
    }
}

.mt_closed {
    ul {
        display: none;
    }


    & > span {
        /* Dossier fermé  */
        .mt_fclosed {
            display: inline;
        }

        /* Dossier fermé : enfants potentiels */
        .mt_plus {
            display: inline;
        }
    }
}

/* Dernier niveau : feuille (pas d'enfants) */
.mt_leaf {
    & > span {
        .mt_none {
            display: inline;
        }
        .mt_minus {
            display: none;
        }
        .mt_plus {
            display: none;
        }
    }
}

.mt_selected > span {
    background-color: rgba(0, 0, 255, 0.2);
    border: 1px solid blue;
    border-radius: 5px;
    -moz-border-radius: 5px;
}

/************
 * Hacks IE *
 ************/

#IE6 {
    /* Simulation of :last-child pseudo-class */
    .MaarchTreeRoot li ul {
        border-left: expression(this.parentNode.nextSibling==null ? 'none' : 'inherit');
    }

    /* simulation os immediate child selector (>)  + rgba() */
    .mt_selected {
        span {
            zoom: 1;
            filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#330000FF, endColorstr=#330000FF);
            border: 1px solid blue;
        }
        li span {
            filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
            border: none;
        }
    }

    /* simulation os immediate child selector (>) */
    .mt_fopened {
        display: expression(/mt_opened/.test(this.parentNode.parentNode.className) ? "inline" : "none");
    }
    .mt_fclosed {
        display: expression(/mt_closed/.test(this.parentNode.parentNode.className) ? "inline" : "none");
    }
    .mt_minus {
        display: expression((/mt_closed/.test(this.parentNode.parentNode.className) || /mt_leaf/.test(this.parentNode.parentNode.className)) ? "none" : "inline");
    }
    .mt_plus {
        display: expression((/mt_opened/.test(this.parentNode.parentNode.className) || /mt_leaf/.test(this.parentNode.parentNode.className)) ? "none" : "inline");
    }
    .mt_none {
        display: expression(/mt_leaf/.test(this.parentNode.parentNode.className) ? "inline" : "none");
    }
}

#IE7 {
    /* Simulation of :last-child pseudo-class */
    .MaarchTreeRoot li ul {
        border-left: expression(this.parentNode.nextSibling==null ? 'none' : 'inherit');
    }

    /* Simulation of rgba() */
    .mt_selected > span {
        zoom: 1;
        filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#330000FF, endColorstr=#330000FF);
    }

}