var FontSizer = {
	orgSize : '11',
	set : function (size) {
		FontSizer.change(size);
		if (FontSizer.orgSize != size) {
			Kook.create('fsz',size,7);
		}
		else {
			Kook.erase('fsz');
		}
	},
	change : function (size) {
		document.getElementsByTagName('BODY')[0].style.fontSize = size+'px';
		document.getElementById('size-1').className = (size==11)?('selected'):('');
		document.getElementById('size-2').className = (size==13)?('selected'):('');
		document.getElementById('size-3').className = (size==15)?('selected'):('');
		
		return false;
	},
	init : function () {
		var fsz = Kook.read('fsz');
		if (fsz) {
			FontSizer.change(fsz);
		}		
	}
}
var Kook = {
	create : function (name, value, days) {
		var expires = "";
		if (days) {
			var d = new Date();
			d.setTime(d.getTime() + (days * 24 * 60 * 60 * 1000));
			expires = "; expires=" + d.toGMTString();
		}
		document.cookie = name + "=" + value + expires + "; path=/";
	},
	read: function (name) {
		var nameEQ = name + "=", ca = document.cookie.split(';');
		for (var i = 0, c; i < ca.length; i++) {
			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;
	},
	erase : function (name) {
		Kook.create(name, "", -1);
	}
};