var pwm_default=1;
var pwm_fontSizes = new Array(0.5,0.7,0.9,1.1,1.3);
function PWM_Fontsize() {
	// get the current font size from the cookie
	this.cookieName='pwmFontSize';
	this.curLevel=this.getLevelFromCookie(this.cookieName);
	if(!isNaN(this.curLevel)) {
		this.curLevel = parseInt(this.curLevel);
	}
	
};
PWM_Fontsize.prototype.init=function(){
	this.updateFontSizeLevel();
};
PWM_Fontsize.prototype.getLevelFromCookie=function(cookieName){
	var level=cookieManager.getCookie(cookieName);
	if(level==false||level==null)level = pwm_default;
	return(level);
};
PWM_Fontsize.prototype.setSizeInCookie=function(cookieName,cookieValue){
	return cookieManager.setCookie(cookieName,cookieValue);
};
PWM_Fontsize.prototype.updateFontSizeLevel=function() {
	document.body.style.fontSize = pwm_fontSizes[this.curLevel] + "em";
};
PWM_Fontsize.prototype.setDefaultFontSize=function() {
	this.curLevel = pwm_default;
	this.updateFontSizeLevel();
	// set the cookie
	this.setSizeInCookie(this.cookieName,pwm_default);
};
PWM_Fontsize.prototype.increaseFontSize=function() {
	if(this.curLevel+1<pwm_fontSizes.length) {
		this.curLevel++;
	}
	this.updateFontSizeLevel();
	// set the cookie
	this.setSizeInCookie(this.cookieName,this.curLevel);
};
PWM_Fontsize.prototype.decreaseFontSize=function() {
	if(this.curLevel-1>=0) {
		this.curLevel--;
	}
	this.updateFontSizeLevel();
	// set the cookie
	this.setSizeInCookie(this.cookieName,this.curLevel);
};
var pwm_fontSize=new PWM_Fontsize();