//______________________________________________________________________
// show/hide layers functionality

if (document.layers){document.location.href="struktur_noscript.php"}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}
function MM_showHideLayers() { //v3.0

  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

struct = new Array('structA','structB','structC','structD','structTopHiA','structTopHiB','structTopHiC','structTopHiD');

function firstshow(){
	MM_showHideLayers('structTopA','','show');
	MM_showHideLayers('structTopB','','show');
	MM_showHideLayers('structTopC','','show');
	MM_showHideLayers('structTopD','','show');
}

function show(l,sl)
	{
	if (l) {
		for (s=0;s<struct.length;s++) {if (s!=l) {MM_showHideLayers(struct[s],'','hide');}
			MM_showHideLayers(l,'','show'); MM_showHideLayers(sl,'','show');
			}
		}
	else {for (s=0;s<struct.length;s++) {MM_showHideLayers(struct[s],'','hide');}}
	}