var HIDDEN;
var VISIBLE;

var imgpfad = "../images/";
var butpfad="../images/buttons/";
var isNav = false;
var isDOM=false;
var isIE = false;
var akt;
var obj;
var anzahlbutt = 6;
var anzahlnav = 6;
var currenttab;
var buttlist = new Array;
var navlist = new Array;
var div_object;
var object;
var div_id;

 isNav = (navigator.appName.indexOf("Netscape") >= 0 && parseInt(navigator.appVersion) == 4);
 isNN6 = (navigator.appName.indexOf("Netscape") >= 0 && parseInt(navigator.appVersion) >= 5);
 isIE = (navigator.appName.indexOf("Microsoft") >= 0 && parseInt(navigator.appVersion) == 4);
 isDOM = (document.getElementById);




function DivObjStyle(div_id){
	if (!div_id || div_id.length==0){
 		if (isDOM) {div_object = eval("document.style");} 
       		else if (isNav) {div_object = eval("document");}
		else if (isIE) {div_object = eval("document.all.style");}
    	}
    	else {  
    		if (isDOM) {div_object = eval("document.getElementById(div_id).style");}   
    		else if (isNav) {div_object = eval("document." + div_id);}
      		else if (isIE) {div_object = eval("document.all." + div_id + ".style");}
   	}  
   	return div_object;
}
 


function DivObjDocument(div_id){
	if (!div_id || div_id.length==0){
		div_object = eval("document");}
    	else {
       		if (isDOM) {div_obj = eval("document");}  
      		else if (isNav) {div_object = eval("document." + div_id + ".document");}
      		else if (isIE) {div_object = eval("document.all." + div_id + ".document");}
   	}  
   	return div_object;
}     


function swapImg(picname,filename) {

	if (document.layers) {
	document.layers.images[picname].src = butpfad + filename;}
	else if (document.all) {
		document.all(picname).src = butpfad + filename;}
	else if (isNN6){
		document.getElementById(picname).src = butpfad + filename;}
}




function highsub(name,n) {
	pic = (name + n);
	if (document.layers) {
		document.layers.images[pic].src = butpfad + "gruen.gif";}
	else if (document.all) {
		document.all(pic).src = butpfad + "gruen.gif";}
	else if (NN6){
		document.getElementById(pic).style.src = butpfad + "gruen.gif";}
}


function normsub(name,n) {
	pic = (name + n);
	if (document.layers) {
		document.layers.images[pic].src = butpfad + "rot.gif";}
	else if (document.all) {
		document.all(pic).src = butpfad + "rot.gif";}
}



function mausover(bild,nr) {
	bild.src= butpfad +"unten"+nr+".jpg";
	div_id="nav"+nr;
 	showObject(div_id);
}


function mausout(bild,nr) {
	if (nr != akt)  {bild.src=butpfad+"norm"+nr+".jpg";}
	div_id="nav"+nr
 	hideObject(div_id);
}


function showObject(div_id) {
	object=DivObjStyle(div_id)
	if (currenttab) {DivObjStyle(currenttab).visibility = "hidden";}
	if(object) {object.visibility = "visible";}
}
 
 
function hideObject(div_id) {
	object=DivObjStyle(div_id)
	if (object){object.visibility = "hidden"; }
 	if (currenttab){DivObjStyle(currenttab).visibility = "visible";}
}


function changeObject(div_id) {
	object=DivObjStyle(div_id)
	if (currenttab) {DivObjStyle(currenttab).visibility = "hidden";}
	if(object) {object.visibility = "visible";}
	currenttab=div_id
}
 





function init(aktuell){
	div_id="nav"+aktuell;
	currenttab=div_id;
	showObject(currenttab);

}