function initFontSize() {
    var fontSizeLevel = "m";
    if (document.cookie.match(/fontSizeLevel=(\w+)/)) {
        fontSizeLevel = RegExp.$1;
    }
    changeFontSize(fontSizeLevel);
}

function changeFontSize(fontSizeLevel) {
    var e = null;
    var fontSize = "";
    var imageFileName = "";
    switch (fontSizeLevel) {
    case "s":
        fontSize = "80%";
        imageFileName = "cmn_hd_il_002s.gif";
        break;
    case "l":
        fontSize = "125%";
        imageFileName = "cmn_hd_il_002b.gif";
        break;
    default:
        fontSize = "100%";
        imageFileName = "cmn_hd_il_002.gif";
        break;
    }
    
    e = document.getElementsByTagName("body");
    if (e) {
        for (var i = 0; i < e.length; i++) {
            e[i].style.fontSize = fontSize;
        }
    }
    
    e = document.getElementById("fsize");
    if (e) {
        e.src = e.src.replace(/\/[^\/]+$/, "/" + imageFileName);
    }
    
    document.cookie = "fontSizeLevel=" + fontSizeLevel + "; path=/";
}