if (document.images) {  
  Companyon = new Image(); Companyon.src = "images/nvgon_02.jpg"; Companyoff = new Image(); Companyoff.src = "images/nvg_02.jpg";
  SReportson = new Image(); SReportson.src = "images/nvgon_03s.jpg"; SReportsoff = new Image(); SReportsoff.src = "images/nvg_03s.jpg";
  LExhibiton = new Image(); LExhibiton.src = "images/nvgon_04.jpg"; LExhibitoff = new Image(); LExhibitoff.src = "images/nvg_04.jpg";
  Partnerson = new Image(); Partnerson.src = "images/nvgon_05.jpg"; Partnersoff = new Image(); Partnersoff.src = "images/nvg_05.jpg";
  Newson = new Image(); Newson.src = "images/nvgon_06.jpg"; Newsoff = new Image(); Newsoff.src = "images/nvg_06.jpg";
  Contacton = new Image(); Contacton.src = "images/nvgon_07.jpg"; Contactoff = new Image(); Contactoff.src = "images/nvg_07.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(); }
}
function clearField(object) {
object.value ="";
}