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