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";

 abton = new Image();
  abton.src = "images/btnabout_ovr.gif";

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

 mison = new Image();
 mison.src = "images/btnmission_ovr.gif";

 misoff = new Image();
 misoff.src = "images/btnmission.gif";
   
  pcon = new Image();
 pcon.src = "images/btnplantc_ovr.gif";

 pcoff = new Image();
 pcoff.src = "images/btnplantc.gif";
   
 snqon = new Image();
 snqon.src = "images/btnsnq_ovr.gif";

 snqoff = new Image();
 snqoff.src = "images/btnsnq.gif";
 
 poon = new Image();
 poon.src = "images/btnplanto_ovr.gif";

 pooff = new Image();
 pooff.src = "images/btnplanto.gif";

 tlpon = new Image();
 tlpon.src = "images/btntotnlp_ovr.gif";

 tlpoff = new Image();
 tlpoff.src = "images/btntotnlp.gif";   

 dofon = new Image();
 dofon.src = "images/btndofac_ovr.gif";

 dofoff = new Image();
 dofoff.src = "images/btndofac.gif";     

 ptdon = new Image();
 ptdon.src = "images/btnplanttd_ovr.gif";

 ptdoff = new Image();
 ptdoff.src = "images/btnplanttd.gif";

 mkdon = new Image();
 mkdon.src = "images/btnmkd_ovr.gif";

 mkdoff = new Image();
 mkdoff.src = "images/btnmkd.gif";

 tfon = new Image();
 tfon.src = "images/btntrainfac_ovr.gif";

 tfoff = new Image();
 tfoff.src = "images/btntrainfac.gif"; 

 ppon = new Image();
 ppon.src = "images/btnplantp_ovr.gif";

 ppoff = new Image();
 ppoff.src = "images/btnplantp.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");
    }
  }
}