function Bildwechsel (bild) {
  document.images["bildgross"].src = bild;
  //nereidFade(document.images["bildgross"],0,0,1000);
  //nereidFade(document.images["bildgross"],100,100,10);
}

nereidFadeObjects = new Object();
nereidFadeTimers = new Object();

function nereidFade(object, destOp, rate, delta){
if (!document.all)
return
    if (object != "[object]"){
        
setTimeout("nereidFade("+object+","+destOp+","+rate+","+delta+")",0);
        return;
    }
        
    clearTimeout(nereidFadeTimers[object.sourceIndex]);
    
    diff = destOp-object.filters.alpha.opacity;
    direction = 1;
    if (object.filters.alpha.opacity > destOp){
        direction = -1;
    }
    delta=Math.min(direction*diff,delta);
    object.filters.alpha.opacity+=direction*delta;

    if (object.filters.alpha.opacity != destOp){
        nereidFadeObjects[object.sourceIndex]=object;
        
nereidFadeTimers[object.sourceIndex]=setTimeout("nereidFade(nereidFadeObjects["+object.sourceIndex+"],"+destOp+","+rate+","+delta+")",rate);
    }
}

function openclosedownloadcenter (datei, folder, divshow, divhide, opt) {
 
    document.getElementById(divshow).style.display = 'block';
	document.getElementById(divhide).style.display = 'none';
	
    if(opt=="open"){
	   document.getElementById(folder).style.display = 'block';
       macheRequest(datei,folder);
    }else{
       document.getElementById(folder).style.display = 'none';
    }
}