// 處理各個icon在滑鼠遊走時的影像

  browserName = navigator.appName;
  browserVer = parseInt(navigator.appVersion);
  if ((browserName == "Netscape" && browserVer >= 3) ||
      (browserName == "Microsoft Internet Explorer" && browserVer >= 4))
        version = "n3";
  else version = "n2";

  if (version == "n3")
  {
    topon = new Image(100, 25);
    topon.src = "/images/Ctop.gif";
    inton = new Image(100, 25);
    inton.src = "/images/Cint.gif";    
    ecoon = new Image(100, 25);
    ecoon.src = "/images/Ceco.gif";
    lifeon = new Image(100, 25);
    lifeon.src = "/images/Clife.gif";
    healthon = new Image(100, 25);
    healthon.src = "/images/Chealth.gif";
    peopleon = new Image(100, 25);
    peopleon.src = "/images/Cpeople.gif";
    spoon = new Image(100, 25);
    spoon.src = "/images/Cspo.gif";
    ussporton = new Image(100, 25);
    ussporton.src = "/images/Cussport.gif";
  
    topoff = new Image(100, 25);
    topoff.src = "/images/Ctop_off.gif";  
    intoff = new Image(100, 25);
    intoff.src = "/images/Cint_off.gif";    
    ecooff = new Image(100, 25);
    ecooff.src = "/images/Ceco_off.gif";
    lifeoff = new Image(100, 25);
    lifeoff.src = "/images/Clife_off.gif";
    healthoff = new Image(100, 25);
    healthoff.src = "/images/Chealth_off.gif";
    peopleoff = new Image(100, 25);
    peopleoff.src = "/images/Cpeople_off.gif"; 
    spooff = new Image(100, 25);
    spooff.src = "/images/Cspo_off.gif";  
    ussportoff = new Image(100, 25);
    ussportoff.src = "/images/Cussport_off.gif";
  } 

  // 一般點選ICON
  function img_act(imgName) {
    imgOn = eval(imgName + "off.src");
    document.images[imgName].src = imgOn;
  }
  function img_inact(imgName) {
    imgOff = eval(imgName + "on.src");
    document [imgName].src = imgOff;
  }