if (document.images) {
head_home_F1 = new Image(70,20); head_home_F1.src = "images/head_home.gif";
head_home_F2 = new Image(70,20); head_home_F2.src = "images/head_home_F2.gif";
head_tool_F1 = new Image(80,20); head_tool_F1.src = "images/head_tool.gif";
head_tool_F2 = new Image(80,20); head_tool_F2.src = "images/head_tool_F2.gif";
head_func_F1 = new Image(75,20); head_func_F1.src = "images/head_func.gif";
head_func_F2 = new Image(75,20); head_func_F2.src = "images/head_func_F2.gif";
head_news_F1 = new Image(105,20); head_news_F1.src = "images/head_news.gif";
head_news_F2 = new Image(105,20); head_news_F2.src = "images/head_news_F2.gif";
head_25_F1 = new Image(90,20); head_25_F1.src = "images/head_25.gif";
head_25_F2 = new Image(90,20); head_25_F2.src = "images/head_25_F2.gif";
head_shop_F1 = new Image(85,20); head_shop_F1.src = "images/head_shop.gif";
head_shop_F2 = new Image(85,20); head_shop_F2.src = "images/head_shop_F2.gif";
head_groop_F1 = new Image(110,20); head_groop_F1.src = "images/head_groop.gif";
head_groop_F2 = new Image(110,20); head_groop_F2.src = "images/head_groop_F2.gif";
head_dl_F1 = new Image(85,20); head_dl_F1.src = "images/head_dl.gif";
head_dl_F2 = new Image(85,20); head_dl_F2.src = "images/head_dl_F2.gif";

head_olshop_F1 = new Image(85,20); head_olshop_F1.src = "images/head_olshop.gif";
head_olshop_F2 = new Image(85,20); head_olshop_F2.src = "images/head_olshop_F2.gif";
head_postage_F1 = new Image(85,20); head_postage_F1.src = "images/head_postage.gif";
head_postage_F2 = new Image(85,20); head_postage_F2.src = "images/head_postage_F2.gif";
head_trading_F1 = new Image(85,20); head_trading_F1.src = "images/head_trading.gif";
head_trading_F2 = new Image(85,20); head_trading_F2.src = "images/head_trading_F2.gif";
head_form_F1 = new Image(85,20); head_form_F1.src = "images/head_form.gif";
head_form_F2 = new Image(85,20); head_form_F2.src = "images/head_form_F2.gif";
}

/* 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);
}