function preLoadImages(){
var t='<layer top="-100" left="0" visibility="hide"><div style="position:absolute; top:-100px; left:0px; visibility:hidden">';
for(i=0;i<arguments.length;i++)t+='<img src="'+arguments[i]+'" height="10" width="10">';
t+='</div></layer>';
document.write(t);
}

preLoadImages('images/map-2b-over.jpg','images/body2b.jpg','images/body3b.jpg','images/body4b.jpg','images/body5b.jpg','images/menu1on.gif','images/menu2on.gif','images/menu3on.gif','images/menu4on.gif','images/menu5on.gif','images/menu6on.gif','images/menu7on.gif','images/menu8on.gif','images/menu9on.gif'); 

function swapImage(imgN,imgU){
if(document.images)document.images[imgN].src=imgU;
}


var win = null;
function popup(mypage,myname,w,h,features) {
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  if (winl < 0) winl = 0;
  if (wint < 0) wint = 0;
  var settings = 'height=' + h + ',';
  settings += 'width=' + w + ',';
  settings += 'top=' + wint + ',';
  settings += 'left=' + winl + ',';
  settings += features;
  win = window.open(mypage,myname,settings);
  win.window.focus();
}