function changeFontsize(size)
{
    document.cookie = "flexibleFontsize" + "=" + size + ";";

    markFontsize();

    setFontsize();

    return false;
};

function setFontsize() {

    var size;

    begin = document.cookie.indexOf("flexibleFontsize=");

    if (begin != -1) {
        begin += 17; /* Anfang des Wertes */
        end = document.cookie.indexOf(";", begin);
        if (end != -1) {
          size = document.cookie.substring(begin, end);
        } else {
          size = document.cookie.substring(begin, begin+16);
        }
    } else {
        size = 11;
    }

    document.getElementById("m3").style.fontSize = size + "px";
    document.getElementById("m2").style.fontSize = size + "px";
    document.getElementById("menustart").style.fontSize = 11 + "px";
/*    document.getElementsByTagName("body")[0].style.fontSize = size + "px";*/
    return false;
}

function markFontsize() {

    var size;

    begin = document.cookie.indexOf("flexibleFontsize=");
    if (begin != -1) {
        begin += 17;
        end = document.cookie.indexOf(";", begin);
        if (end != -1) {
          size = document.cookie.substring(begin, end);
        } else {
          size = document.cookie.substring(begin, begin+16);
        }
    } else {
        size = 11;
    }

    document.getElementById("fs11").style.textDecoration = "none";
    document.getElementById("fs12").style.textDecoration = "none";
    document.getElementById("fs13").style.textDecoration = "none";

    document.getElementById("fs" + size).style.textDecoration = "underline";

    return false;
}