.RM_categories_root_icon {
    background-image: url(../images/categories1.png) !important;
}
.RM_categories_trash_icon {
    background-image: url(../images/trash.gif) !important;
}
.RM_categories_disabled_icon {
    background-image: url(../images/disabled.gif) !important;
}
.unit-category-icon {
    background-image: url(../images/unitcategory.png) !important;
}