visSubCat = 0;

	function placeSubMenu ( el, n ) {
		var s = document.getElementById(el);
		s.style.top = (540 - n * 15) + "px";
		s.style.height = 570 - (540 - n * 15) + "px";
	}
	
	function showSubMenu ( el, stat, bildweg ) {
		
		if( el != 'sub_p' ) document.getElementById('sub_p').style.visibility = "hidden";
		if( el != 'sub_k' ) document.getElementById('sub_k').style.visibility = "hidden";
		if( el != 'sub_a' ) {
			document.getElementById('sub_a').style.visibility = "hidden";
			closeSubCat ( true );
		}
		document.getElementById(el).style.visibility = stat;
		if( bildweg && document.getElementById("bild") != null ) document.getElementById("bild").style.visibility = "hidden";
		if(  document.getElementById("pres") != null ) document.getElementById("pres").style.visibility = "hidden";
		if(  el == 'sub_a' && document.getElementById("titel_re") != null ) document.getElementById("titel_re").style.visibility = "hidden";
	}
	
	function showSubCat ( nr, c ) {
		if( visSubCat != nr ) {
			// subCat unsichtbar...
			closeSubCat ();
				
			// gewaehlte subCat sichtbar...
			var cat = document.getElementById("s" + nr);
			// subCat merken zum schliessen
			visSubCat = nr;
			
			cat.style.visibility = "visible";
			cat.style.top = 525 - (c + nr - 2 ) * 15 + "px";
			var step = c * 15;
			stepSubCat = step;
			--nr;
			while( document.getElementById("k" + (++nr)) != null ) {
				var s = document.getElementById("k" + nr);
				s.style.top = parseInt(s.style.top) - step + "px";
			}
		}
	}
	
	function closeSubCat ( all ) {
		if( visSubCat > 0 ) { 
			document.getElementById("s" + visSubCat).style.visibility = "hidden";
			--visSubCat;
			// ...geoefnette kategorie schliessen.
			while( document.getElementById("k" + (++visSubCat)) != null ) {
				var s = document.getElementById("k" + visSubCat);
				s.style.top = parseInt(s.style.top) + stepSubCat + "px";
			}
		}
		if( all ) {
			visSubCat = 0;
		}
	}
	
	function allOut () {
		document.getElementById("sub_p").style.visibility = "hidden";
		document.getElementById("sub_k").style.visibility = "hidden";
		document.getElementById("sub_a").style.visibility = "hidden";
		closeSubCat ( true );
		if(  document.getElementById("bild") != null ) document.getElementById("bild").style.visibility = "visible";
		if(  document.getElementById("pres") != null ) document.getElementById("pres").style.visibility = "visible";
		if(  document.getElementById("titel_re") != null ) document.getElementById("titel_re").style.visibility = "visible";
	}
	
	function changeW ( nr ) {
		document.getElementById( 'b' + nr ).src = 'side_w.gif';
	}
	
	function changeG ( nr ) {
		document.getElementById( 'b' + nr ).src = 'side_g.gif';
	}