ar minFontSize = 9;
var maxFontSize = 13;

function setFontSize(action)
{
    var curSize = parseInt($("body").css("font-size"));
    var newSize = 10;
    switch(action)
    {
        case "-":
            newSize = curSize == minFontSize ? minFontSize : curSize - 1;
            break;
        case "0":
            newSize = 10;
            break;
        case "+":
            newSize = curSize == maxFontSize ? maxFontSize : curSize + 1;
            break;
        default:
            newSize = action;
    }
    document.cookie = "fontSize=" + newSize;
    $("body").css("font-size",newSize + "px");
}

function setFontSizeByCookie() {
    var cookies = document.cookie.split(";");
    for(var i=0;i<cookies.length;i++) {
        cookies[i] = jQuery.trim(cookies[i]);
        var cookie = cookies[i].split("=");
        if(cookie[0] == "fontSize") {
            setFontSize(cookie[1]);
        }
    }
    //console.log(cookies);
}

$(document).ready(function() {
    setFontSizeByCookie();
});