browser = (document.images) 
if ( browser) {
  var _img=new Image();
  var _imgList = new Array("images/nav01on01.gif",
                           "images/nav01on02.gif",
                           "images/nav02on01.gif",
                           "images/nav02on02.gif",
                           "images/nav02on03.gif",
                           "images/nav02on04.gif",
                           "images/nav03on01.gif",
                           "images/nav03on02.gif",
                           "images/nav04on01.gif",
                           "images/nav04on02.gif"
									
                          );
  var _imgPath = "./";
  preload(_imgList);
}

function preload(theimgList) {
  _Images = new Array()
  theCounter = theimgList.length - 1;
  for(i = 0; i <= theCounter; i++) {
     _Images[i] = new Image()
     _Images[i].src = new String(_imgPath + theimgList[i])
  }
}

function hilite(target,image) {
  if ( browser) {
        _img.src= _imgPath + image;
	document.images[target].src=_img.src;
  }
}