function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImg(obj, img, mode) {
  if (document.images && (preloadFlag == true))
  {
    if(mode=="in") obj.src = "images/buttons/butt_over_"+img+".gif";
    else if(img < 0)
      obj.src = "images/buttons/butt_sel_"+(img*(-1))+".gif";
    else
      obj.src = "images/buttons/button_"+img+".gif";
  }
  return true;
}

var preloadFlag = false;
var ieBrowser = true;
function preloadImages() 
{
  if (document.images) {
    var iImgs = 18;
    var arrMenu = new Array(iImgs);
    for(var i=0; i<iImgs/2; i++) {
      arrMenu[i] = newImage("images/buttons/butt_over_"+(i+1)+".gif");
      arrMenu[i+iImgs/2] = newImage("images/buttons/butt_over_"+(i+iImgs/2+1)+".gif");
    }
    preloadFlag = true;
  }

  if (navigator.appName.toUpperCase().match(/MICROSOFT INTERNET EXPLORER/) == null)
  {
    ieBrowser = false;
    var obj = document.getElementById("iDivSubMenu");
    obj.style.marginTop = 0;
    obj.style.marginLeft = 0;
  }
}