function changeFontSize(action) {
	var size = '';

	if (action == 'shrink') {
		var cookie = readCookie('fontSizeEW');

		if (cookie == 'large')
			size = 'normal';
		else if (cookie == 'largest')
			size = 'large';
	}
	else if (action == 'enlarge') {
	var cookie = readCookie('fontSizeEW');
		if (cookie == null || cookie == 'normal')
			size = 'large';
		else if (cookie == 'large')
			size = 'largest';
	}

	if (size == 'normal') {
		document.body.style.fontSize = '62.5%';
		eraseCookie('fontSizeEW');
		createCookie('fontSizeEW', 'normal', 1);
	}
	else if (size == 'large') {
		document.body.style.fontSize = '80%';
		eraseCookie('fontSizeEW');
		createCookie('fontSizeEW', 'large', 1);
	}
	else if (size == 'largest') {
		document.body.style.fontSize = '100%';
		eraseCookie('fontSizeEW');
		createCookie('fontSizeEW', 'largest', 1);
	}
}

function createCookie(name, value, days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		var expires = "; expires=" + date.toGMTString();
	}
	else var expires = "";
	document.cookie = name + "=" + value + expires + "; path=/";
}

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

function eraseCookie(name) {
	createCookie(name, "", -1);
}