// preload menu images
for(i=0; i<menuItems.length;i++) {
  eval("var "+menuItems[i]+"_off=new Image();");
  eval(menuItems[i]+"_off.src='/images/nav/sacramento/"+menuItems[i]+"_off.gif';");
  eval("var "+menuItems[i]+"_on=new Image();");
  eval(menuItems[i]+"_on.src='/images/nav/sacramento/"+menuItems[i]+"_on.gif';");
}
// handle image rollovers
function swap(act,n) {
  stayOn = false;
  for(i in track_nav){ if(track_nav[i]==menuItems[n]) stayOn=true; }
  if(document.images && !stayOn) {
    eval("document."+menuItems[n]+".src="+menuItems[n]+"_"+act+".src;");
  }
}