function lastmodified(){
var modifieddate = document.lastModified;
var md = new Date(modifieddate)
var result =  md
var dayofmonth = md.getDate(modifieddate) 
result = dayofmonth
result += "/"
result += md.getMonth(modifieddate)+1
result += "/"
var year =md.getYear(modifieddate)
result += year
result +=" "
var hours = md.getHours(modifieddate)
result += hours
result +=":"
var minutes = md.getMinutes(modifieddate)
result += minutes
result +=":"
var seconds = md.getSeconds(modifieddate)
result += seconds
return result
}

if (document.images) {
    
  homeon = new Image();
  homeon.src = "images/btnhome_ovr.gif";

  homeoff = new Image();
  homeoff.src = "images/btnhome.gif";

  backon = new Image();
  backon.src = "images/btn-back-ovr.gif";

  backoff = new Image();
  backoff.src = "images/btn-back.gif";
  
  abton = new Image();
  abton.src = "images/btnabout_ovr.gif";

  abtoff = new Image();
  abtoff.src = "images/btnabout.gif";
   
  pdon = new Image();
  pdon.src = "images/btnpd_ovr.gif";

  pdoff = new Image();
  pdoff.src = "images/btnpd.gif";
  
  pfon = new Image();
  pfon.src = "images/btnpf_ovr.gif";

  pfoff = new Image();
  pfoff.src = "images/btnpf.gif";
  
  rpon = new Image();
  rpon.src = "images/btnrp_ovr.gif";

  rpoff = new Image();
  rpoff.src = "images/btnrp.gif";
  
  oson = new Image();
  oson.src = "images/btnos_ovr.gif";

  osoff = new Image();
  osoff.src = "images/btnos.gif";

  eson = new Image();
  eson.src = "images/btnes_ovr.gif";

  esoff = new Image();
  esoff.src = "images/btnes.gif";

  suon = new Image();
  suon.src = "images/btnsu_ovr.gif";

  suoff = new Image();
  suoff.src = "images/btnsu.gif";

  sron = new Image();
  sron.src = "images/btnsr_ovr.gif";

  sroff = new Image();
  sroff.src = "images/btnsr.gif";
  
  mton = new Image();
  mton.src = "images/btnmt_ovr.gif";

  mtoff = new Image();
  mtoff.src = "images/btnmt.gif";

  tuon = new Image();
  tuon.src = "images/btntu_ovr.gif";

  tuoff = new Image();
  tuoff.src = "images/btntu.gif";
  
  maon = new Image();
  maon.src = "images/btnma_ovr.gif";

  maoff = new Image();
  maoff.src = "images/btnma.gif";

  icon = new Image();
  icon.src = "images/btnic_ovr.gif";

  icoff = new Image();
  icoff.src = "images/btnic.gif";  
  
}

function chgImages() {
  if (document.images) {
    for (var i=0; i<chgImages.arguments.length; i+=2) {
      document[chgImages.arguments[i]].src = eval(chgImages.arguments[i+1] + ".src");
    }
  }
}