// Swap image function 
  function ChangeImage (ImageName, FileName) {
    if (document.images) {
      document[ImageName].src = eval(FileName + ".src");
    }
  }


// OPEN WINDOW SCRIPT - CENTERED
var win = null;
function openWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable=no'
win = window.open(mypage,myname,settings)
}


   
/// NAV Image preloader
if (document.images) {
  hm_n5a = new Image(1,1);
  hm_n5a.src = "images/hm_n5a.gif";
  hm_n5b = new Image(1,2);
  hm_n5b.src = "images/hm_n5b.gif";
  
}