if (document.images) {
  Researchon = new Image(); Researchon.src = "img/research_over.jpg"; Researchoff = new Image(); Researchoff.src = "img/research.jpg";
  Teachingon = new Image(); Teachingon.src = "img/teach_over.jpg"; Teachingoff = new Image(); Teachingoff.src = "img/teach.jpg";
  Linkson = new Image(); Linkson.src = "img/links_over.jpg"; Linksoff = new Image(); Linksoff.src = "img/links.jpg";
  Homeon = new Image(); Homeon.src = "img/home_over.jpg"; Homeoff = new Image(); Homeoff.src = "img/home.jpg";
  Contacton = new Image(); Contacton.src = "img/cont_over.jpg"; Contactoff = new Image(); Contactoff.src = "img/cont.jpg";
  Aboutmeon = new Image(); Aboutmeon.src = "img/aboutme_over.jpg"; Aboutmeoff = new Image(); Aboutmeoff.src = "img/aboutme.jpg";
  Inston = new Image(); Inston.src = "img/Inst_over.jpg"; Instoff = new Image(); Instoff.src = "img/Inst.jpg";
  btn2on = new Image(); btn2on.src = "img/btn_over.jpg"; btn2off = new Image(); btn2off.src = "img/btn.jpg";
  btn3on = new Image(); btn3on.src = "img/btn_over.jpg"; btn3off = new Image(); btn3off.src = "img/btn.jpg";
  btn4on = new Image(); btn4on.src = "img/btn_over.jpg"; btn4off = new Image(); btn4off.src = "img/btn.jpg";
  btn5on = new Image(); btn5on.src = "img/btn_over.jpg"; btn5off = new Image(); btn5off.src = "img/btn.jpg";
  btn6on = new Image(); btn6on.src = "img/btn_over.jpg"; btn6off = new Image(); btn6off.src = "img/btn.jpg";
  CaTon = new Image(); CaTon.src = "img/pnl1_on.jpg"; CaToff = new Image(); CaToff.src = "img/pnl1.jpg";
}
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");
    }
  }
}
function NewWindow(mypage, myname, w, h, scroll) {
var winleft = (screen.width - w) / 2.7;
winprops = 'height='+h+',width='+w+',top='+0.0+',left='+winleft+',scrollbars='+scroll+',resizable,toolbar=yes,location=yes,directories=no,status=yes,menubar=yes'
win = window.open(mypage, myname, winprops)
if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}