if (document.images) {
  accbut_F1   = new Image(116,37); accbut_F1.src = "images/accbut.gif";
  accbut_F2   = new Image(116,37); accbut_F2.src = "images/accbut_F2.gif";
  contbut_F1  = new Image(116,37); contbut_F1.src = "images/contbut.gif";
  contbut_F2  = new Image(116,37); contbut_F2.src = "images/contbut_F2.gif";
  homebut_F1  = new Image(116,37); homebut_F1.src = "images/homebut.gif";
  homebut_F2  = new Image(116,37); homebut_F2.src = "images/homebut_F2.gif";
  newbut_F1   = new Image(116,37); newbut_F1.src = "images/newbut.gif";
  newbut_F2   = new Image(116,37); newbut_F2.src = "images/newbut_F2.gif";
  rackbut_F1  = new Image(116,37); rackbut_F1.src = "images/rackbut.gif";
  rackbut_F2  = new Image(116,37); rackbut_F2.src = "images/rackbut_F2.gif";
  salebut_F1  = new Image(116,37); salebut_F1.src = "images/salebut.gif";
  salebut_F2  = new Image(116,37); salebut_F2.src = "images/salebut_F2.gif";
  softbut_F1  = new Image(116,37); softbut_F1.src = "images/softbut.gif";
  softbut_F2  = new Image(116,37); softbut_F2.src = "images/softbut_F2.gif";
  tbut_F1     = new Image(116,37); tbut_F1.src = "images/tbut.gif";
  tbut_F2     = new Image(116,37); tbut_F2.src = "images/tbut_F2.gif";
  trackbut_F1 = new Image(116,37); trackbut_F1.src = "images/trackbut.gif";
  trackbut_F2 = new Image(116,37); trackbut_F2.src = "images/trackbut_F2.gif";
  storebut_F1 = new Image(116,37); storebut_F1.src = "images/storebut.gif";
  storebut_F2 = new Image(116,37); storebut_F2.src = "images/storebut_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);
}