// FontChanger
// Copyright (c) 2007 Hirotaka Ogawa
// REQUIRES: prototype.js, cookiemanager.js
FontChanger = Class.create();
FontChanger.prototype = {
	id: null,
	cookieManager: null,
	cookieName: 'body.style.fontSize',
	initialize: function(id) {
		this.id = id || 'fontChanger';
		this.cookieManager = new CookieManager();
		var fontSize = this.cookieManager.getCookie(this.cookieName);
		if (fontSize) document.body.style.fontSize = fontSize;
	},
	setCookieShelfLife: function(days) {
		this.cookieManager.cookieShelfLife = days;
	},
	change: function(fontSize) {
		document.body.style.fontSize = fontSize;
		this.cookieManager.setCookie(this.cookieName, fontSize);
	},
	reset: function() {
		document.body.style.fontSize = '';
		this.cookieManager.clearCookie(this.cookieName);
	},
	show: function() {
		var id = this.id;
		document.writeln([
'<div id="' + id + '">',
'<span class="font_bt03" style="cursor: pointer; font-size: 120%;" id="' + id + '-large"><IMG src="./img/bt03.jpg" width="19" height="15" onMouseover=this.src="./img/bt03ro.jpg" onMouseout=this.src="./img/bt03.jpg"></span>',
'<span class="font_bt02" style="cursor: pointer; font-size: 100%;" id="' + id + '-medium"><IMG src="./img/bt02.jpg" width="19" height="15" onMouseover=this.src="./img/bt02ro.jpg" onMouseout=this.src="./img/bt02.jpg"></span>','<span class="font_bt01" style="cursor: pointer; font-size: 80%;" id="' + id + '-small"><IMG src="./img/bt01.jpg" width="19" height="15" onMouseover=this.src="./img/bt01ro.jpg" onMouseout=this.src="./img/bt01.jpg"></span></div>'
		].join("\n"));
		Event.observe($(id + '-small'), 'click', this.onClickSmall.bind(this));
		Event.observe($(id + '-medium'), 'click', this.onClickMedium.bind(this));
		Event.observe($(id + '-large'), 'click', this.onClickLarge.bind(this));
	},
	onClickSmall: function(e) { this.change('10px'); },
	onClickMedium: function(e) { this.change('12px'); },
	onClickLarge: function(e) { this.change('14px'); }
};
FontChanger.start = function(id) {
	var fontChanger = new FontChanger(id);
	fontChanger.setCookieShelfLife(90);
	fontChanger.show();
};
<!--
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->