function incFontSize(val){
	setFontSize((aktSize*10 + val)/10);
}

function decFontSize(val){
	setFontSize((aktSize*10 - val)/10);
}

function setFontSize(fSize){	
	if(fSize == 'null')
		fSize = 0.6;
		
	if(fSize >= 1.4)
		fSize = 1.4;
	
	if(fSize <= 0.6)
		fSize = 0.6;
		
	aktSize = fSize;
	document.getElementsByTagName('body')[0].style.fontSize = aktSize + font_unity;
	
	// cookie schreiben
	var datum = new Date();
	datum = new Date(datum.getTime() +1000*60*60*24*365);
	document.cookie = 'fSize='+aktSize+'; expires='+datum.toGMTString()+';';
}

function init_fSize(){
	
	cookies = checkCookie();
	
	if(cookies)
		cookieSize = getCookie('fSize');
	
	aktSize = (cookieSize == '') ? fSizeStd : cookieSize;
	
	imgWidth = new Array();
	imgHeight = new Array();
	
	
	if(aktSize != fSizeStd)
		setFontSize(aktSize);
}