if (document.images) {
        menu1on = new Image();
        menu1on.src = "images/nav-home-on.gif"; 
        menu1off = new Image();
        menu1off.src = "images/nav-home-off.gif";
        
        awh1on = new Image();
        awh1on.src = "images/awh-on.gif"; 
        awh1off = new Image();
        awh1off.src = "images/awh-off.gif";
}
function changeImages(){
        if(document.images){
                for (var i=0; i<changeImages.arguments.length; i+=2) {
                        document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
                }
        }
}




var win = null;
function newWindow(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();
}