browserName = navigator.appName;   // detect browser
    browserVer = parseInt(navigator.appVersion);
    if (browserName == "Netscape" && browserVer >= 3)
        browserVer = "1";
    else if (browserName == "Microsoft Internet Explorer" && browserVer == 4)
        browserVer = "1";
    else
        browserVer = "2";

    //preload images - insert the names and sizes of your images here:
    if (browserVer == 1) {
        homeoff = new Image(58,23);
        homeoff.src = "../images/zzb0f0.gif";
        homeon = new Image(58,23);
        homeon.src = "../images/zzb0f1.gif";
        siidaoff = new Image(53,23);
        siidaoff.src = "../images/zzb1f0.gif";
        siidaon = new Image(53,23);
        siidaon.src = "../images/zzb1f1.gif";
        siidaakt = new Image(53,23);
        siidaakt.src = "../images/zzb1f2.gif";
        museooff = new Image(97,23);
        museooff.src = "../images/zzb2f0.gif";
        museoon = new Image(97,23);
        museoon.src = "../images/zzb2f1.gif";
	museoakt = new Image(97,23);
	museoakt.src = "../images/zzb2f2.gif";
        kaleoff = new Image(86,23);
        kaleoff.src = "../images/zzb3f0.gif";
        kaleon = new Image(86,23);
        kaleon.src = "../images/zzb3f1.gif";
	kaleakt = new Image(86,23);
	kaleakt.src = "../images/zzb3f2.gif";
        palvoff = new Image(81,23);
        palvoff.src = "../images/zzb4f0.gif";
        palvon = new Image(81,23);
        palvon.src = "../images/zzb4f1.gif";
	palvakt = new Image(81,23);
	palvakt.src = "../images/zzb4f2.gif";
        infooff = new Image(50,23);
        infooff.src = "../images/zzb5f0.gif";
        infoon = new Image(50,23);
        infoon.src = "../images/zzb5f1.gif";
    }

    function hiLite(imgDocID,imgObjName) {
        if (browserVer == 1) {
            document.images[imgDocID].src = eval(imgObjName + ".src")
        }
    }