function BrowserCheck() {
    var b = navigator.appName;
    var a = navigator.userAgent;
    this.mac = (a.indexOf('Mac')>0);
    this.win = (a.indexOf('Win')>0);
    if (b=="Netscape") this.b = "ns";
    else if (b=="Microsoft Internet Explorer") this.b = "ie";
    else this.b = b;
    this.v = parseInt(navigator.appVersion);
    this.ns = (this.b=="ns" && this.v>=4);
    this.ns4 = (this.b=="ns" && this.v==4);
    this.ns5 = (this.b=="ns" && this.v==5);
    this.ie = (this.b=="ie" && this.v>=4);
    this.ie4 = (navigator.userAgent.indexOf('MSIE 4')>0);
    this.ie5 = (navigator.userAgent.indexOf('MSIE 5')>0);
    if (this.ie5) this.v = 5;
    this.min = (this.ns||this.ie);
}

// automatically create the "is" object
is = new BrowserCheck();

function printen() {
    // Deze functie werkt niet op de Mac, om onduidelijke reden.
    if(!is.mac)
    {
        if(window.print) window.print();
    }
    //else alerter("printmelding.html");
}