function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
alt_heritage_header_02_over = newImage("/images/nav/alt-heritage-header_02-over.gif");
alt_heritage_header_03_over = newImage("/images/nav/alt-heritage-header_03-over.gif");
alt_heritage_header_04_over = newImage("/images/nav/alt-heritage-header_04-over.gif");
alt_heritage_header_05_over = newImage("/images/nav/alt-heritage-header_05-over.gif");
            leftcol_ar_over = newImage("/images/nav/lnav_arkansas-over.gif");
            leftcol_ga_over = newImage("/images/nav/lnav_georgia-over.gif");
            leftcol_la_over = newImage("/images/nav/lnav_lousiana-over.gif");
            leftcol_ms_over = newImage("/images/nav/lnav_mississippi-over.gif");
            leftcol_nm_over = newImage("/images/nav/lnav_newmexico-over.gif");
            leftcol_ok_over = newImage("/images/nav/lnav_oklahoma-over.gif");
            leftcol_sc_over = newImage("/images/nav/lnav_southcarolina-over.gif");
            leftcol_tn_over = newImage("/images/nav/lnav_tennessee-over.gif");
            leftcol_tx_over = newImage("/images/nav/lnav_texas-over.gif");
           leftcol_lux_over = newImage("/images/nav/lnav_luxembourg-over.gif");
          leftcol_nova_over = newImage("/images/nav/lnav_novascotia-over.gif");
          leftcol_scot_over = newImage("/images/nav/lnav_scotland-over.gif");
           scotland_on_over = newImage("/images/nav/topc-scotland-over.gif");
           santa_fe_on_over = newImage("/images/nav/topc-santa_fe-over.gif");
                jfk_on_over = newImage("/images/nav/topc-jfk_on-over.gif");
               open_on_over = newImage("/images/nav/individuals-over.gif");
             school_on_over = newImage("/images/nav/school-over.gif");
    preloadFlag = true;
  }
}