ns = (document.layers) ? 1 : 0;
ie = (document.all) ? 1 : 0;
ns6 = (document.getElementById) ? 1 : 0;
function changeImages() {
	if (document.images ) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var letztes_bild;

function show_layer(x)
{
	if(letztes_bild) { hide_layer(letztes_bild); } letztes_bild=x;
	if(ns) { document.layers[x].visibility="show"; } else if (ie) {	document.all[x].style.visibility="visible";	} else {document.getElementById(x).style.visibility="visible";}
}
function hide_layer(x)
{
	if(ns) {document.layers[x].visibility="hide";} else if (ie) {document.all[x].style.visibility="hidden";}else {document.getElementById(x).style.visibility="hidden";}
}

var currentId = 0;
var maxId = imgArray.length;
function loadImage(id)
{
   if(typeof document.images['bigImage'] == 'undefined'){
      return;
   }
   document.images['bigImage'].src = imgArray[id];
   currentId = id;
   checkSubtitle();
}
function forwardImg()
{
   if(typeof document.images['bigImage'] == 'undefined'){
      return;
   }
   
   if(currentId >= maxId-1) return;
   document.images['bigImage'].src = imgArray[++currentId];
   checkSubtitle();
} 

function backwardImg()
{
   if(typeof document.images['bigImage'] == 'undefined'){
      return;
   }
   if(currentId <1) {
      return;
   }
   document.images['bigImage'].src = imgArray[--currentId];
   checkSubtitle();
}
function checkSubtitle()
{
   if(currentId == 0){       
      document.getElementById("nice").className ='act';
      document.getElementById("clean").className ='none';
      document.getElementById("clever").className ='none';
   }
   if(currentId == 1){
      document.getElementById("nice").className ='none';
      document.getElementById("clean").className ='act';
      document.getElementById("clever").className ='none';
   }if(currentId == 2){
      document.getElementById("nice").className ='none';
      document.getElementById("clean").className ='none';
      document.getElementById("clever").className ='act';
   }  
}