if (document.images) {
button_exting_F1 = new Image(150,18); button_exting_F1.src = "img/interface/menu/buttons/img-button_fireext_id.gif";
button_exting_F2 = new Image(150,18); button_exting_F2.src = "img/interface/menu/buttons/img-button_fireext_ro.gif";

button_training_F1 = new Image(150,18); button_training_F1.src = "img/interface/menu/buttons/img-button_firetraining_id.gif";
button_training_F2 = new Image(150,18); button_training_F2.src = "img/interface/menu/buttons/img-button_firetraining_ro.gif";

button_servicing_F1 = new Image(150,18); button_servicing_F1.src = "img/interface/menu/buttons/img-button_servicing_id.gif";
button_servicing_F2 = new Image(150,18); button_servicing_F2.src = "img/interface/menu/buttons/img-button_servicing_ro.gif";

button_about_F1 = new Image(150,18); button_about_F1.src = "img/interface/menu/buttons/img-button_about_id.gif";
button_about_F2 = new Image(150,18); button_about_F2.src = "img/interface/menu/buttons/img-button_about_ro.gif";

button_facts_F1 = new Image(150,18); button_facts_F1.src = "img/interface/menu/buttons/img-button_factsheets_id.gif";
button_facts_F2 = new Image(150,18); button_facts_F2.src = "img/interface/menu/buttons/img-button_factsheets_ro.gif";
}

/* Function that displays status bar messages. */

function dm(msgStr) {
    window.status = msgStr;
    document.MM_returnValue = true;
}

/* Function that swaps images. */

function di20(id, newSrc) {
    var theImage = FWFindImage(document, id, 0);
    if (theImage) {
        theImage.src = newSrc;
    }
}

/* Functions that track and set toggle group button states. */

function FWFindImage(doc, name, j) {
    var theImage = false;
    if (doc.images) {
        theImage = doc.images[name];
    }
    if (theImage) {
        return theImage;
    }
    if (doc.layers) {
        for (j = 0; j < doc.layers.length; j++) {
            theImage = FWFindImage(doc.layers[j].document, name, 0);
            if (theImage) {
                return (theImage);
            }
        }
    }
    return (false);
}