/*************************************************
* SUBNAVIGATION EIN-/AUSBLENDEN
*************************************************/

// Vordefinierte Arrays mit IDs der Subnavigationen und Buttons

var navs = new Array('nav_01', 
					'nav_02', 
					'nav_03', 
					'nav_04');

var subnavs = new Array('main_subnav_kommentar', 
						'main_subnav_tipps', 
						'main_subnav_downloads', 
						'main_subnav_bestellen');

// Subnavigation einblenden und Button aktivieren

function switch_subnav(num) {
	for(var i=0; i < subnavs.length; ++i) {	
		if(i == num) {
			if(document.getElementById(navs[i]).src !== '/images/'+navs[i]+'-x.gif') {
				document.getElementById(navs[i]).src = '/images/'+navs[i]+'-x.gif';
				}
			if(document.getElementById(subnavs[i]).style.display !== 'block') {
				document.getElementById(subnavs[i]).style.display = 'block';		
				}
			}			
		else {
			document.getElementById(navs[i]).src = '/images/'+navs[i]+'.gif';
			document.getElementById(subnavs[i]).style.display = 'none';
			}
		}
	}

// Subnavigation ausblenden und Button deaktivieren
	
function close_subnav(num) {
	document.getElementById(navs[num]).src = '/images/'+navs[num]+'.gif';
	document.getElementById(subnavs[num]).style.display = 'none';
	}