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);
}
// JavaScript Document
var fontObj = {
	CSSArray:['font_normal.css', 'font_big.css', 'font_bigger.css'],
	CSSSelected:0,
	init:function(){
		this.CSSSelected = this.getFontSizeCookie();
		var fsize_css = document.createElement('link');
		fsize_css.setAttribute('href','/css/'+this.CSSArray[this.CSSSelected]);
		fsize_css.setAttribute('id','altcss');
		fsize_css.setAttribute('rel','stylesheet');
		fsize_css.setAttribute('title','gerencia tamanho da fonte');
		document.getElementsByTagName('head')[0].appendChild(fsize_css);
	},
	getFontSizeCookie:function(){
		var cookie = readCookie("FSize");
		var fsize = cookie ? parseInt(cookie) : 1;
		return fsize;
	},	
	getFontSizeCSS:function(){
		var cssfont = document.getElementById('altcss');
		return cssfont;
	},
	setFontSizeCSS:function(){
		var cssfont = this.getFontSizeCSS();
		cssfont.setAttribute('href','/css/'+this.CSSArray[this.CSSSelected]);
		return true;
	},
	fontChangeUp:function(){
		this.CSSSelected = (this.CSSSelected >= this.CSSArray.length-1) ? this.CSSSelected : this.CSSSelected +1;
		this.setFontSizeCSS(this.CSSSelected);
		createCookie("FSize", this.CSSSelected, 365);
		return false;
	},
	fontChangeDown:function(){
		this.CSSSelected = (this.CSSSelected <= 1) ? 0 : this.CSSSelected -1;
		this.setFontSizeCSS(this.CSSSelected);
		createCookie("FSize", this.CSSSelected, 365);
		return false;
	}
}
fontObj.init();