var prefsLoaded = false;
var defaultFontSize = 75;
var currentFontSize = defaultFontSize;

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

function changeFontSize(sizeDifference) {
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 5);

	if(currentFontSize > 100) {
		currentFontSize = 100;
	}
	else if(currentFontSize < 50) {
		currentFontSize = 50;
	}

	setFontSize(currentFontSize);
}

function setFontSize(fontSize) {
	var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
	document.body.style.fontSize = fontSize + '%';
}


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;
}

function setUserOptions() {
	if(!prefsLoaded) {
		cookie = readCookie("handy-team.de");
		currentFontSize = cookie ? cookie : defaultFontSize;

		if(currentFontSize < 50 || currentFontSize > 100) {
			currentFontSize = defaultFontSize;
		}

		setFontSize(currentFontSize);

		prefsLoaded = true;
	}
}

function saveSettings() {
	createCookie("handy-team.de", currentFontSize, 365);
}