var min = 12;
var max = 18;

function increaseFontSize () 
{
	var div = document.getElementById('pageText');

	if(div.style.fontSize)
	{
		var s = parseInt(div.style.fontSize.replace("px",""));
	} else {
		var s = 12;
	}
	if(s!=max) 
	{
		s += 1;
	}
	div.style.fontSize = s+"px";
	createCookie('fontSize', s, 30);
}

function decreaseFontSize ()
{
	var div = document.getElementById('pageText');

	if(div.style.fontSize) 
	{
		var s = parseInt(div.style.fontSize.replace("px",""));
	} else {
		var s = 12;
	}
	if(s!=min) 
	{
		s -= 1;
	}
	div.style.fontSize = s+"px";
	createCookie('fontSize', s, 30);
}

function setFontSize ()
{
	var s = readCookie('fontSize');
	if (s != null)
	{
		var div = document.getElementById('pageText');
		div.style.fontSize = s+"px";	
	}
}

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);
}