function getObj(objId) {
    if (document.getElementById)
        obj = document.getElementById(objId);
    else if (document.all)
        obj = document.all[objId];
    else
        obj = null;
    return obj;
}

var Cookies = {
    add: function (name, value, days) {
        var expires = '';
        if (days) {
            var date = new Date();
            date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
            expires = '; expires=' + date.toGMTString(); ;
        }
        document.cookie = name + "=" + escape(value) + expires + "; path=/";
    },
    remove: function (name) {
        this.add(name, '', -1);
    },
    get: function (name) {
        var results = document.cookie.match(name + '=([^;]*?)(;|$)');
        if (results)
            return (unescape(results[1]));
        else
            return null;
    }
};
FontSizer.Instances = new Object();

function FontSizer(type, upid, downid, resetid) {
    this.baseSize = 13;
    this.stepSize = 2;
    this.maxSize = 20;
    this.minSize = 9;
    this.sizeElement = type;

    this.cookieName = type + "FontSizer";
    var x = Cookies.get(this.cookieName);
    this.currentSize = (x) ? parseInt(x) : this.baseSize;
    if (this.currentSize != this.baseSize) this.ChangeSize();

    FontSizer.Instances[type] = this;

    var upObj = getObj(upid);
    if (upObj) upObj.onclick = function () { FontSizer.Instances[type].UpSize(); return false; };
    var downObj = getObj(downid);
    if (downObj) downObj.onclick = function () { FontSizer.Instances[type].DownSize(); return false; };
    var rsObj = getObj(resetid);
    if (rsObj) rsObj.onclick = function () { FontSizer.Instances[type].Reset(); return false; }
}

var FSP = FontSizer.prototype;
FSP.Reset = function () { Cookies.remove(this.cookieName); this.currentSize = this.baseSize; this.ChangeSize(); }
FSP.ChangeSize = function () {
    Cookies.add(this.cookieName, this.currentSize, 7);
    var sizeElement = getObj(this.sizeElement);
    if (sizeElement) sizeElement.style.fontSize = (this.currentSize / this.baseSize) + 'em';
}
FSP.UpSize = function () { this.currentSize = Math.min(this.currentSize + this.stepSize, this.maxSize); this.ChangeSize(); }
FSP.DownSize = function () { this.currentSize = Math.max(this.currentSize - this.stepSize, this.minSize); this.ChangeSize(); }

//window.onload = function init() {var FS = new FontSizer('subcontent','fntSizeInc','fntSizeDec','fntSizeReset');}
//FS.update();