function set_cookie(name, value, expires)
{
if (!expires)
{
expires = new Date();
}
document.cookie = name + "=" + escape(value) + "; expires=" + expires.toGMTString() +  "; path=/";
}


function get_cookie(name)
{
cookie_name = name + "=";
cookie_length = document.cookie.length;
cookie_begin = 0;
while (cookie_begin < cookie_length)
{
value_begin = cookie_begin + cookie_name.length;
if (document.cookie.substring(cookie_begin, value_begin) == cookie_name)
{
var value_end = document.cookie.indexOf (";", value_begin);
if (value_end == -1)
{
value_end = cookie_length;
}
return unescape(document.cookie.substring(value_begin, value_end));
}
cookie_begin = document.cookie.indexOf(" ", cookie_begin) + 1;
if (cookie_begin == 0)
{
break;
}
}
return null;
}


function setFontSize () {
var Size = get_cookie("fontSize");
	if(Size != null) {
		var p = document.getElementsByTagName('body');
		p[0].style.fontSize = Size+"px";
	}
}


function increaseFontSize() {
   var p = document.getElementsByTagName('body');
    if(p[0].style.fontSize) {
		var s = parseInt(p[0].style.fontSize.replace("px",""));
    } else {
        var s = 14;
    }
	if (s<19) {s += 1;}
	p[0].style.fontSize = s+"px"
	expires = new Date();
	expires.setTime(expires.getTime() + (1000 * 86400 * 365));
	set_cookie("fontSize", s, expires);
}

function decreaseFontSize() {
	var p = document.getElementsByTagName('body');
	if(p[0].style.fontSize) {
		var s = parseInt(p[0].style.fontSize.replace("px",""));
	} else {
		var s = 14;
	}
	if (s>10) {s -= 1;}
	p[0].style.fontSize = s+"px"
	expires = new Date();
	expires.setTime(expires.getTime() + (1000 * 86400 * 365));
	set_cookie("fontSize", s, expires);
}

function standartFontSize() {
	var p = document.getElementsByTagName('body');
	p[0].style.fontSize = "14px"
	expires = new Date();
	expires.setTime(expires.getTime() + (1000 * 86400 * 365));
	set_cookie("fontSize", "14", expires);
}