var maxScale = 170;
var minScale = 90;
var currentScale = 120;

function scaleUp() {
	if ( currentScale < maxScale ) {
		// Increase our scale by 10%
		currentScale += 10;
		
		updateScales();
		createCookie('fontScale', currentScale, 365);
	}
}

function scaleDown() {
	if ( currentScale > minScale ) {
		// Increase our scale by 10%
		currentScale -= 10;
		
		updateScales();
		createCookie('fontScale', currentScale, 365);
	}
}

function updateScales() {
	$('content').style.fontSize = currentScale + "%";
}

/**
 * quirksmode javascript cookie utility functions.
 * makes our lives a little easier.
 */
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);
}