var body_size = 62.5;

jQuery(document).ready(function () {
    var ul = jQuery("<ul>");
    ul.append(jQuery("<li>").append(jQuery("<a>").attr("href", "javascript:decreaseSize();").append(jQuery("<img>").attr("src", "/art_resources/images/font-size-a.png"))));
    ul.append(jQuery("<li>").append(jQuery("<a>").attr("href", "javascript:increaseSize();").append(jQuery("<img>").attr("src", "/art_resources/images/font-size-aa.png"))));
    jQuery("#sizefont").append(ul);

    initSize();
});

function fixSize(size) {
    setCookie( "font_size", size, 100, "/" );
    text_size = size + '%';
    document.body.style.fontSize = text_size;
}

function increaseSize() {
    var size = getCookie("font_size");
    if (size == null)
        size = body_size + 10;
    else if (size < 87.5)
        size = eval(size) + 10;
    fixSize(size);
}

function decreaseSize() {
    var size = getCookie("font_size");
    if (size == null)
        size = body_size - 10;
    else if (size > 35)
        size = eval(size) - 10;
    fixSize(size);
}

function initSize() {
    var size = getCookie("font_size");
    if (size == null)
        size = body_size;
    fixSize(size);
}

function restoreSize() {
    var size = body_size;
    fixSize(size);
}

function setCookie(name, value, days, path, domain, secure) {
    var expires, date;
    if (typeof days == "number") {
        date = new Date();
        date.setTime( date.getTime() + (days*24*60*60*1000) );
        expires = date.toGMTString();
    }
    document.cookie = name + "=" + escape(value) +
    ((expires) ? "; expires=" + expires : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
}

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

function deleteCookie(name,path,domain) {
    if (getCookie(name)) {
        document.cookie = name + "=" +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}