function SetVisible(id, visible) {
    elem = document.getElementById(id);
    if (elem != null)
        elem.style.display = visible;
    
    return (elem != null);
}

function CheckBrowserVersion() {
    var browserName = navigator.appName;
    var browserVersion = parseInt(navigator.appVersion);

    if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && (navigator.appVersion.indexOf("MSIE 6.0") != -1 || navigator.appVersion.indexOf("MSIE 5.5") != -1 || navigator.appVersion.indexOf("MSIE 5.0") != -1)) {
        document.write('<div class="JavaScriptDiv"><p class="JavaScriptMessage" style="background: orange;">Du verwendest eine alte Browser-Version. Aus Sicherheitsgr&uuml;nden sollte diese aktualisiert werden! (Weiter zum <a target="_blank" href="http://www.microsoft.com/windows/ie/">Gratis-Download</a>)</p></div>') ;
    }
}