var incdec = 0;
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);
}

function loadCss(x){
	
	try{
		$('myContent').setStyle({fontSize: (12+x)+'px'});
	}catch(err){}
}

function increaseFontSize() {
	if(incdec < 3){
		incdec++;
		loadCss(incdec);
		createCookie('fontSizer',incdec,1); 
	}
}

function decreaseFontSize() {
	if(incdec > -3){
		incdec--;
		loadCss(incdec);
		createCookie('fontSizer',incdec,1); 
	}		
}

function resetFontSize() {
		incdec = 0;
		loadCss(incdec);
		createCookie('fontSizer',incdec,1); 
}

Event.observe(window,'load',function(e){
	var x = readCookie('fontSizer');
	if (x && x!=0) {
		x = parseInt(x);
		incdec = x;
		loadCss(x);
	}
});


//eraseCookie('fontSizer');