/********************** ZOOM FUNKTIONEN **********************/

var size;
var dateObj = new Date();

// Halbes Jahr Lebenszeit des Cookies
var cookieLifeTime = 180 * 24 * 60 * 60 * 1000;

// Autoload Zoom
window.addEventListener?window.addEventListener("load",zoomstart,false):window.attachEvent("onload", zoomstart);

function zoomstart() {
    if (getCookie('fontsize')) {
        document.body.style.fontSize = getCookie('fontsize');
    }
}

function zoomin() {
    var expireDate = new Date(dateObj.getTime() + cookieLifeTime);

    size = document.body.style.fontSize;
    if(size == '') size = '100%';
    newsize = parseInt(size.replace(/%/,'')) + 10; 
    document.body.style.fontSize = newsize + '%';
    setCookie('fontsize', newsize + '%', expireDate);
}

function zoomout() {
    var expireDate = new Date(dateObj.getTime() + cookieLifeTime);

    size = document.body.style.fontSize;
    if(size == '') {
        size = '100%';
        document.body.style.fontSize = '90%';
        setCookie('fontsize', '90%', expireDate);
    } else {
        newsize = parseInt(size.replace(/%/,'')) - 10;
        if(newsize <= 60) {
            document.body.style.fontSize = size;
            setCookie('fontsize', size, expireDate);
        } else {
            document.body.style.fontSize = newsize + '%';
            setCookie('fontsize', newsize + '%', expireDate);
        }
    }
}



/********************** COOKIE FUNKTIONEN **********************/

function setCookie(name, value, expires, path, domain, secure) {
    var curCookie = name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
    document.cookie = curCookie;
}

function getCookie(name) {
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1) {
       begin = dc.indexOf(prefix);
       if (begin != 0) return null;
    } else {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1) {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}