var prefsLoaded = false;
var defaultFontSize = 76;
var currentFontSize = defaultFontSize;
var stObj;

function setIniFont(){
    if(!prefsLoaded){
        cookie = readCookie("fontSize");
        currentFontSize = cookie ? cookie : defaultFontSize;
        setFontSize(currentFontSize);
        prefsLoaded = true;
    }
}

function revertStyles(){
    currentFontSize = defaultFontSize;
    changeFontSize(0);
}

function changeFontSize(sizeDifference){
    currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 5);
    if(currentFontSize > 100){
        currentFontSize = 100;
    }else if(currentFontSize < 60){
        currentFontSize = 60;
    }
    setFontSize(currentFontSize);
}

function setFontSize(fontSize){
    stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
    document.body.style.fontSize = fontSize + '%';
    saveSettings();
}

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

function saveSettings() {
    createCookie("fontSize", currentFontSize, 365);
}