function bannerchanger(from) {
    if(document.images && load_banner) {
      document.images[from].src = banpics[currentimage].src;
      if (banpics[currentimage].alt) document.images[from].alt = banpics[currentimage].alt;
      currentlink = currentimage;			
      if (currentimage < banpics.length-1) 
        currentimage = currentimage + 1;
      else 
        currentimage = 0;
      setTimeout("bannerchanger('" + from + "')", delay);
    }
  }
	
  function FollowLink() {
    if(document.images) {
      if (newbrowser == true) {
        window.open(banlinks[currentlink], 'newwindow', '', false);			
      } else
        document.location.href = banlinks[currentlink];
    }
  }

/* js code to be stated in HTML file
  var load_banner = true;
  var currentlink = 0;
  var currentimage = 0;
  var delay = 2000;
  var newbrowser = false;
	
  //specify banners
  if(document.images) {
    banpics = new Array();	
    banpics[0] = new Image();
    banpics[0].src = "http://www.itservices.hku.hk/images/news/news28-3.jpg";
    banpics[1] = new Image();
    banpics[1].src = "http://www.itservices.hku.hk/images/news/news28-1.jpg";
    banpics[2] = new Image();
    banpics[2].src = "http://www.itservices.hku.hk/images/news/news28-2.jpg";
		
    //specify banner links
    banlinks = new Array();	
    banlinks[0] = "http://www.itservices.hku.hk/news/ccnews119/seminar.htm";
    banlinks[1] = "http://www.itservices.hku.hk/news/ccnews119/hkuems.htm";
    banlinks[2] = "http://www.itservices.hku.hk/news/ccnews119/tpg-online-admission-system.htm";
  }
*/