function changeFontsize(size) {
	var linkElements = document.getElementsByTagName('link');
	
	// Disabling and enabling stylesheets
	for (var i = 0; i < linkElements.length; i++) {
		if (linkElements[i].getAttribute('title')) {
			linkElements[i].disabled = true;
			if (linkElements[i].getAttribute('title') == size) {
				linkElements[i].disabled = false;
			}
		}
	}
	
	// Setting a cookie
	var expiration = new Date();
	var expirationOneYear = expiration.getTime() + (365 * 24 * 60 * 60 * 1000);
	expiration.setTime(expirationOneYear);
	document.cookie = 'fontsize='+ size +'; expires='+ expiration.toGMTString();
}