if (document.images) {

  toc_item["bullet_issuehome"] = new toc_item ( "bullet_globalnav_o.gif", "bullet_globalnav.gif");
  toc_item["bullet_change"] = new toc_item ( "bullet_globalnav_o.gif", "bullet_globalnav.gif");
  toc_item["bullet_saaweb"] = new toc_item ( "bullet_globalnav_o.gif", "bullet_globalnav.gif");
  toc_item["bullet_features"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["features"] = new toc_item ( "nav_features_o.gif", "nav_features.gif");
  toc_item["bullet_red"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["red"] = new toc_item ( "nav_red_o.gif", "nav_red.gif");
  toc_item["bullet_farm"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["farm"] = new toc_item ( "nav_farm_o.gif", "nav_farm.gif");
  toc_item["farmnews"] = new toc_item ( "nav_farmnews_o.gif", "nav_farmnews.gif");
  toc_item["farmsports"] = new toc_item ( "nav_farmsports_o.gif", "nav_farmsports.gif");
  toc_item["bullet_dept"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["dept"] = new toc_item ( "nav_dept_o.gif", "nav_dept.gif");
  toc_item["bullet_classnotes"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["classnotes"] = new toc_item ( "nav_classnotes_o.gif", "nav_classnotes.gif");
  toc_item["bullet_show"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["show"] = new toc_item ( "nav_show_o.gif", "nav_show.gif");
  toc_item["bullet_pc"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["pc"] = new toc_item ( "nav_pc_o.gif", "nav_pc.gif");
  toc_item["bullet_columns"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["columns"] = new toc_item ( "nav_columns_o.gif", "nav_columns.gif");
  toc_item["bullet_classifieds"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["classifieds"] = new toc_item ( "nav_classifieds_o.gif", "nav_classifieds.gif");
  toc_item["bullet_contact"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["contact"] = new toc_item ( "nav_contact_o.gif", "nav_contact.gif");
  toc_item["bullet_donate"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["donate"] = new toc_item ( "nav_donate_o.gif", "nav_donate.gif");
  toc_item["bullet_back"] = new toc_item ( "bullet_nav_o.gif", "bullet_nav.gif");
  toc_item["back"] = new toc_item ( "nav_back_o.gif", "nav_back.gif");
}

function imageOn(itemID)
{
  if (document.images) {
    document.images[itemID].src = toc_item[itemID].toc_img_on.src;
  }
}

function imageOff(itemID)
{
  if (document.images) {
    document.images[itemID].src = toc_item[itemID].toc_img_off.src;
  }
}

function toc_item (sourceOn,sourceOff)
{
  this.sourceOn = sourceOn;
  this.sourceOff = sourceOff;
  
  if (document.images) {
    this.toc_img_on = new Image();
    this.toc_img_off  = new Image();
    this.toc_img_on.src = "/news/magazine/images/wrapper/" + this.sourceOn;
    this.toc_img_off.src  = "/news/magazine/images/wrapper/" + this.sourceOff;
  }
}