// called by initialise. Checks for cookie value and calls setFontSize
function checkForCookie() {
	setFontSize(readCookie('cue'));
}

// takes the value passed to it, saves it into cookie and shows the site in the new size
function setFontSize(newValue) {
	createCookie('cue',newValue,400);
	showFontSize(newValue);
}

// shows the font in the size requested
function showFontSize(requestedSize) {
	var setTo = 100;
	
	if (requestedSize == 1) setTo = 65;
	if (requestedSize == 2) setTo = 80;
	if (requestedSize == 3) setTo = 100;
	if (requestedSize == 4) setTo = 150;
	if (requestedSize == 5) setTo = 180;

	screenSize = (setTo * .8);
	
	document.getElementById('content').style.fontSize = screenSize + '%';
	document.getElementById('feature').style.fontSize = screenSize + '%';
	document.getElementById('footer').style.fontSize = screenSize + '%';
	document.getElementById('nav2').style.fontSize = screenSize + '%';
	document.getElementById('primaryNav').style.fontSize = setTo + '%';
	document.getElementById('tools').style.fontSize = screenSize + '%';
	
	// save cookie data
	createCookie('cue',requestedSize,400);
}

// creates a new cookie
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=/";
}

// reads a cookie
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;
}