.iface-link {
    background-image:url(./images/link.png) !important;
}

.iface-link-add {
    background-image:url(./images/link_add.png) !important;
}

.iface-link-edit {
    background-image:url(./images/link_edit.png) !important;
}

.iface-nat {
    background-image:url(./images/link_go.png) !important;
}

.iface-nat-clear {
    background-image:url(./images/link_break.png) !important;
}