var defaultFontSize = 100;
var currentFontSize = defaultFontSize;
var currentStyle = "";

//-------------------------------------------------------------------------------------------------

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

function changeFontSize(sizeDifference){
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 5);
	if(currentFontSize > 150){
		currentFontSize = 150;
	}else if(currentFontSize < 53){
		currentFontSize = 53;
	}
	setFontSize(currentFontSize);
};

function setFontSize(fontSize){
	//var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
	document.body.style.fontSize = fontSize + '%';
	//alert (document.body.style.fontSize);
};
//-------------------------------------------------------------------------------------------------
  function piktowechsel(Zahl) {
    window.document.images['picto'].src = AlleBilder[Zahl].src;
  }
//-------------------------------------------------------------------------------------------------
function Klappen(Id) {
	var nav_auf_n="sfs/sfpfeilru-n.gif", nav_zu_n="sfs/sfpfeilre-n.gif";
	var nav_auf_h="sfs/sfpfeilru-h.gif", nav_zu_h="sfs/sfpfeilre-h.gif";

	if (Id == 1) {
		/*
		var KlappText;
		var KlappBild;
		KlappText = document.getElementById('Lay2');
		KlappBild = document.getElementById('Pic2');
		KlappText.style.display = 'none';
		KlappBild.src = nav_zu_n;
		KlappText = document.getElementById('Lay3');
		KlappBild = document.getElementById('Pic3');
		KlappText.style.display = 'none';
		KlappBild.src = nav_zu_n;
		document.location.href = 'philosophie.php';
		*/
	} else {
		for (var i = 2; i <= 3; i++) {
			if ( i != Id) {
			    document.getElementById('Lay'+i).style.display = 'none';
			    document.getElementById('Pic'+i).src = nav_zu_n;
			    document.getElementById('Ul'+i).style.backgroundColor = "#FFFFFF";
			    document.getElementById('Ul'+i).style.Color = "#000000";
			}
		}
		if (document.getElementById('Lay'+Id).style.display == 'block') {
			document.getElementById('Lay'+Id).style.display = 'none';
			document.getElementById('Pic'+Id).src = nav_zu_h;
			document.getElementById('Ul'+i).style.backgroundColor = "#003269";
			document.getElementById('Ul'+i).style.Color = "#FFFFFF";
		} else {
			document.getElementById('Lay'+Id).style.display = 'block';
			document.getElementById('Pic'+Id).src = nav_auf_h;
			document.getElementById('Ul'+Id).style.backgroundColor = "#003269";
			document.getElementById('Ul'+i).style.Color = "#FFFFFF";
		}
		 //document.blur()
	}
}

/*/ BROWSERABFRAGE **********************
//plattform:
os=navigator.platform;
Mac = (os.indexOf("Mac") != -1) ? 1 : 0;
Win = (os.indexOf("Win") != -1) ? 1 : 0;

//browser:
var agt=navigator.userAgent.toLowerCase();

d=document;
OP = (agt.indexOf("opera") != -1) ? 1 : 0;
IE = (d.all && !OP) ? 1 : 0;
MOZ = (!d.all && d.getElementById) ? 1 : 0; // Mozillas => Firefox!!
N = (agt.indexOf("netscape") != -1 && d.getElementById) ? 1 : 0; // NTSC ab Vers. 6!!
N4 = (d.layers && !d.getElementById) ? 1 : 0;
SAF = (Mac && agt.indexOf("safari") != -1) ? 1 : 0;
function vorladen() {
    for (i=0; i < BildArray.length; i++) {
      AlleBilder[i] = new Image();
      AlleBilder[i].src = BildArray[i];
    }
}

// ENDE BROWSERABFRAGE **********************

// extra anweisung, damit die navigation auch auf netscape funktioniert!!
if (N) {
	document.write("<style>div.navibox {height: 2.3em}<\/style>");
}
*/