var prefsLoaded = false;
var currentFontSize = 10;

function revertStyles() {
	currentFontSize = 10;
	changeFontSize(0);
}

function changeFontSize(sizeDifference) {
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference);

	if (currentFontSize > 13) {
		currentFontSize = 13;
	} else if (currentFontSize < 10) {
		currentFontSize = 10;
	}

	setFontSize(currentFontSize);
}

function setFontSize(fontSize) {
	var divs = document.getElementsByTagName('body');
	for (var i=0; i < divs.length; i++) {
		var div = divs[i];
		div.style.fontSize = fontSize + '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 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;
}

window.onload = setUserOptions;

function setUserOptions() {
	if(!prefsLoaded) {
		cookie = readCookie("fontSize");
		currentFontSize = cookie ? cookie : 11;
		setFontSize(currentFontSize);

		prefsLoaded = true;
	}

}

window.onunload = saveSettings;

function saveSettings() {
	createCookie("fontSize", currentFontSize, 365);
}
*/