function saveFontSize(value, expiredays)
{
    var exdate=new Date();
    exdate.setDate(exdate.getDate()+expiredays);
    document.cookie="fontsize=" +value+ ";path=/" +
    ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

function loadFontSize()
{
    var cookieValue = document.cookie.split(";");
    for(var i=0;i < cookieValue.length; i++)
    {
        var fontSize = cookieValue[i].split("=");
        if(fontSize[0] == "fontsize")
        {
            resizeText(fontSize[1]);
        }
    }
}

function resizeText(size) 
{       
    document.body.style.fontSize = size + "em";
    
    saveFontSize(size, 30);
}