var currentFontSize;

function toInt ( x ) {
	return ( x > 0 ? Math.floor( x ) : Math.ceil ( x ) )
}

function holeCookie(Keksname) {
	alleCookies=document.cookie;
	cookieArr=alleCookies.split(";");	
	for(var i=0;i<cookieArr.length;i++) {
		cookieList = cookieArr[i].split("=");
		cookieName = cookieList[0].replace(/ /, "");
		cookieValue = cookieList[1];
		
		if (cookieName=="fontsize") {
			return cookieValue;
		}
	}
	return false;
}

function applyFontSize () {
	document.getElementsByTagName('body')[0].style.fontSize = (70+currentFontSize) + "%";
}
function IncreaseFontSize() {
	currentFontSize = currentFontSize + 10;
	document.cookie = "fontsize=" + currentFontSize + "; path=/";	
	applyFontSize();
}
function DecreaseFontSize() {
	currentFontSize = currentFontSize - 10;
	document.cookie = "fontsize=" + currentFontSize + "; path=/";
	applyFontSize();
}
function ResetFontSize() {
	currentFontSize = 0;
	document.cookie = "fontsize=" + currentFontSize + "; path=/";
	applyFontSize();
}

currentFontSize = toInt (holeCookie("fontsize"));